diff --git a/buildglyphs.ptl b/buildglyphs.ptl
index f02c0a1..a59a900 100644
--- a/buildglyphs.ptl
+++ b/buildglyphs.ptl
@@ -11,6 +11,7 @@ import './support/fairify' as fairify
 import [mix linreg clamp fallback TempFont includeGlyphPart compsiteMarkSet suggestGC] from './support/utils'
 import [calculateMetrics setFontMetrics] from './meta/aesthetics'
 import [nameFont] from './meta/naming'
+import './meta/features' as Features
 
 ### Autoarg macro
 define [$NamedParameterPair$ l r] : begin
@@ -20,8 +21,6 @@ define [$NamedParameterPair$ l r] : begin
 
 define-operator "--" 890 'right' : syntax-rules
 	`(@l -- @r) [atom l] `[new $NamedParameterPair$ @{".quote" [formOf l]} @r]
-define-operator "~>" 880 'right' : syntax-rules
-	`(@l ~> @r) `{.left @l .right @r}
 
 define-macro params : syntax-rules
 	`[params @_pairs @body] : begin
@@ -366,9 +365,10 @@ export as build : define [buildFont para recursive recursiveCodes] : begin
 	$$include 'glyphs/symbol-other.ptl'
 
 	# Autobuilds
-	set font.features {.}
 	$$include 'glyphs/autobuilds.ptl'
-	$$include 'glyphs/features.ptl'
+
+	if [not recursive] : begin
+		set {.GSUB font.GSUB .GPOS font.GPOS .GDEF font.GDEF} : Features.apply para glyphList
 
 	set font.glyfMap glyphs
 	return font
diff --git a/generator.js b/generator.js
index bce27ca..41f87a1 100644
--- a/generator.js
+++ b/generator.js
@@ -25,7 +25,6 @@ var font = function () {
 	console.log('    Start building font ' + fontUniqueName);
 	var font = buildGlyphs.build.call(emptyFont, para);
 	console.log('    ' + fontUniqueName + " Successfully built.");
-	font.features.sscompose = para.sscompose;
 	font.parameters = para;
 	font.glyf = font.glyf.sort(function(a, b){
 		var pri1 = a.cmpPriority || 0;
@@ -46,23 +45,6 @@ if (argv.charmap) (function () {
 	})), 'utf8')
 })();
 
-if (argv.feature) (function () {
-	console.log('    Writing feature file -> ' + argv.feature);
-	var featurefile = '\n\n';
-
-	// MG groups
-	for (var key in font.features.markGlyphs) {
-		featurefile += '@MG_' + key + '= [' + font.features.markGlyphs[key].join(' ') + '];\n'
-	}
-
-	featurefile += fs.readFileSync(__dirname + '/features/common.fea', 'utf-8');
-	featurefile += fs.readFileSync(__dirname + '/features/' + (font.parameters.isItalic ? 'italiconly.fea' : 'uprightonly.fea'), 'utf-8');
-	if (font.parameters.spacing > 0) {
-		featurefile += fs.readFileSync(__dirname + '/features/ligation.fea', 'utf-8');
-	}
-	fs.writeFileSync(argv.feature, featurefile, 'utf-8');
-})();
-
 /*
 // Currently unused
 if(argv.ttf) (function(){
@@ -169,8 +151,5 @@ if (argv.meta) (function () {
 		font.glyf = null;
 		font.glyfMap = null;
 	}
-	if (argv.feature) {
-		font.features = null;
-	}
 	fs.writeFileSync(argv.meta, JSON.stringify(font));
 })();
\ No newline at end of file
diff --git a/glyphs/autobuilds.ptl b/glyphs/autobuilds.ptl
index cee5a04..f76df23 100644
--- a/glyphs/autobuilds.ptl
+++ b/glyphs/autobuilds.ptl
@@ -126,7 +126,7 @@ define customDecompositions : object
 	."\u21AE" ""
 
 let : begin
-	suggestGC
+	if [not recursive] : suggestGC
 	define [isAboveMark mark] : mark && mark.anchors && mark.anchors.above && mark.anchors.above.type === MARK
 	define [iotaBelowToLF p j parts] : if (p === glyphs.iotaBelow) : set parts.(j) glyphs.iotaLF
 	define [ogonekBelowToTR p j parts] : if (p === glyphs.ogonekBelow) : set parts.(j) glyphs.ogonekTR
diff --git a/makesupport.mk b/makesupport.mk
index c748564..e49a0dd 100644
--- a/makesupport.mk
+++ b/makesupport.mk
@@ -8,9 +8,9 @@ snapshot/assets :
 	@- mkdir $@
 	
 PATELC = node ./node_modules/patel/bin/patel-c
-SUPPORT_FILES_FROM_PTL = support/glyph.js support/spiroexpand.js support/spirokit.js parameters.js support/anchor.js support/point.js support/transform.js support/utils.js meta/aesthetics.js meta/naming.js
+SUPPORT_FILES_FROM_PTL = support/glyph.js support/spiroexpand.js support/spirokit.js parameters.js support/anchor.js support/point.js support/transform.js support/utils.js meta/aesthetics.js meta/naming.js meta/features.js
 SUPPORT_FILES = $(SUPPORT_FILES_FROM_PTL) generator.js emptyfont.toml parameters.toml support/fairify.js
-GLYPH_SEGMENTS = glyphs/common-shapes.ptl glyphs/overmarks.ptl glyphs/letters-unified-basic.ptl glyphs/letters-unified-extended.ptl  glyphs/numbers.ptl glyphs/symbol-punctuation.ptl glyphs/symbol-math.ptl glyphs/symbol-geometric.ptl glyphs/symbol-other.ptl glyphs/symbol-braille.ptl glyphs/symbol-letter.ptl glyphs/autobuilds.ptl glyphs/features.ptl
+GLYPH_SEGMENTS = glyphs/common-shapes.ptl glyphs/overmarks.ptl glyphs/letters-unified-basic.ptl glyphs/letters-unified-extended.ptl  glyphs/numbers.ptl glyphs/symbol-punctuation.ptl glyphs/symbol-math.ptl glyphs/symbol-geometric.ptl glyphs/symbol-other.ptl glyphs/symbol-braille.ptl glyphs/symbol-letter.ptl glyphs/autobuilds.ptl
 SCRIPTS = $(SUPPORT_FILES) buildglyphs.js
 SCRIPTS_FROM_aki = $(SUPPORT_FILES_FROM_PTL) buildglyphs.js
 
@@ -28,6 +28,7 @@ support/spiroexpand.js : support/spiroexpand.ptl
 support/utils.js : support/utils.ptl
 meta/aesthetics.js : meta/aesthetics.ptl
 meta/naming.js : meta/naming.ptl
+meta/features.js : meta/features.ptl
 parameters.js : parameters.ptl
 
 cleanscripts : 
diff --git a/glyphs/features.ptl b/meta/features.ptl
similarity index 89%
rename from glyphs/features.ptl
rename to meta/features.ptl
index b01ffd1..52f5c54 100644
--- a/glyphs/features.ptl
+++ b/meta/features.ptl
@@ -1,8 +1,9 @@
-### Generate Features and remove double-width glyphs when necessary
-local markGlyphs {.all {} }
+define-operator "~>" 880 'right' : syntax-rules
+	`(@l ~> @r) `{.left @l .right @r}
 
-# GPOS
-symbol-block 'GPOS' : if [not recursive] : begin
+export : define [apply para glyphList] : begin
+	local markGlyphs {.all {} }
+	# GPOS
 	local lookup_mark
 		.type 'gpos_mark_to_base'
 		.subtables {}
@@ -10,7 +11,7 @@ symbol-block 'GPOS' : if [not recursive] : begin
 		.type 'gpos_mark_to_mark'
 		.subtables {}
 	
-	set font.GPOS : object
+	local GPOS : object
 		languages
 			.DFLT_DFLT {.features {'mark0', 'mkmk0'}}
 			.latn_DFLT {.features {'mark0', 'mkmk0'}}
@@ -68,20 +69,18 @@ symbol-block 'GPOS' : if [not recursive] : begin
 	createMTSSubtable lookup_mkmk {'below'}
 	createMTSSubtable lookup_mkmk {'trailing' 'lf' 'topright' 'bottomright' 'overlay' 'slash'}
 
-# GDEF
-symbol-block 'GDEF' : if [not recursive] : begin
-	set font.GDEF {.glyphClassDef {.}}
+	# GDEF
+	local GDEF {.glyphClassDef {.}}
 	foreach glyph [items-of glyphList] : begin
-		set font.GDEF.glyphClassDef.(glyph.name) : if [[regex '_'].test glyph.name] 2 1
+		set GDEF.glyphClassDef.(glyph.name) : if [[regex '_'].test glyph.name] 2 1
 		if (glyph.anchors && [begin [local anchorKeys : Object.keys glyph.anchors] anchorKeys.length]) : begin
 			foreach key [items-of anchorKeys] : if (glyph.anchors.(key).type == 'mark') : begin
 				if [not markGlyphs.(key)] : set markGlyphs.(key) {}
 				markGlyphs.(key).push glyph.name
 				markGlyphs.all.push glyph.name
-				set font.GDEF.glyphClassDef.(glyph.name) 3
+				set GDEF.glyphClassDef.(glyph.name) 3
 
-# GSUB
-symbol-block 'GSUB' : if [not recursive] : begin
+	# GSUB
 	local commonList {}
 	local languages
 		.DFLT_DFLT {.features commonList}
@@ -274,15 +273,14 @@ symbol-block 'GSUB' : if [not recursive] : begin
 	set features.locl_bgr {'locl_bgr'}
 
 	# cvxx
-	foreach [name : items-of : Object.keys glyphs] : begin
-		if glyphs.(name).featureSelector : begin
-			local fs glyphs.(name).featureSelector
-			foreach [feature : items-of : Object.keys fs] : begin
-				if [not lookups.(feature)] : begin
-					set features.(feature) {feature}
-					set lookups.(feature) {.type 'gsub_single' .subtables{{.}}}
-					commonList.push feature
-				set lookups.(feature).subtables.0.(name) fs.(feature)
+	foreach [glyph : items-of glyphList] : if glyph.featureSelector : begin
+		local fs glyph.featureSelector
+		foreach [feature : items-of : Object.keys fs] : begin
+			if [not lookups.(feature)] : begin
+				set features.(feature) {feature}
+				set lookups.(feature) {.type 'gsub_single' .subtables{{.}}}
+				commonList.push feature
+			set lookups.(feature).subtables.0.(glyph.name) fs.(feature)
 	# ssxx
 	local sscompose : if para.isItalic para.sscompose.italic para.sscompose.upright
 	foreach [name : items-of : Object.keys sscompose] : begin
@@ -293,4 +291,6 @@ symbol-block 'GSUB' : if [not recursive] : begin
 	set languages.'cyrl_MKD ' {.features [{'locl_srb'}.concat commonList]}
 	set languages.'cyrl_BGR ' {.features [{'locl_bgr'}.concat commonList]}
 
-	set font.GSUB {.languages languages .features features .lookups lookups}
\ No newline at end of file
+	local GSUB {.languages languages .features features .lookups lookups}
+
+	return [object GSUB GPOS GDEF]
\ No newline at end of file
diff --git a/onegroup.mk b/onegroup.mk
index eaf9f11..2d931e3 100644
--- a/onegroup.mk
+++ b/onegroup.mk
@@ -30,7 +30,7 @@ DISTDIR = dist/$(ARCPREFIX)$(ARCPREFIXB)
 $(DISTDIR) : dist
 	@- $(MKDIR) $@
 
-NODE_FDT = @node $(NODE_FDT_OPTIONS)
+NODE_FDT = @node --expose-gc $(NODE_FDT_OPTIONS)
 NODE = node
 
 UPRIGHT = $(OBJDIR)/$(PREFIX)-thin.ttf $(OBJDIR)/$(PREFIX)-extralight.ttf $(OBJDIR)/$(PREFIX)-light.ttf $(OBJDIR)/$(PREFIX)-regular.ttf $(OBJDIR)/$(PREFIX)-medium.ttf $(OBJDIR)/$(PREFIX)-bold.ttf $(OBJDIR)/$(PREFIX)-heavy.ttf