diff --git a/entity.cpp b/entity.cpp
index c65d65f..01b18b5 100644
--- a/entity.cpp
+++ b/entity.cpp
@@ -649,6 +649,7 @@ void Entity::DrawOrGetDistance(int order) {
                     tail = SS.GW.projRight.ScaledBy(w/s).Plus(
                            SS.GW.projUp.   ScaledBy(h/s)).Plus(
                            gn.ScaledBy(-4*w/s)).Minus(SS.GW.offset);
+                    glLineWidth(2);
                 }
 
                 Vector v = (q.RotationN()).WithMagnitude(50/SS.GW.scale);
@@ -660,6 +661,7 @@ void Entity::DrawOrGetDistance(int order) {
                 LineDrawOrGetDistance(tip,tip.Minus(v.RotatedAbout(axis, 0.6)));
                 LineDrawOrGetDistance(tip,tip.Minus(v.RotatedAbout(axis,-0.6)));
             }
+            glLineWidth(1);
             break;
         }
 
diff --git a/sketch.cpp b/sketch.cpp
index 23fec1e..7cdf196 100644
--- a/sketch.cpp
+++ b/sketch.cpp
@@ -75,7 +75,7 @@ void Group::MenuGroup(int id) {
             g.type = EXTRUDE;
             g.opA = SS.GW.activeGroup;
             g.wrkpl.entityB = SS.GW.activeWorkplane;
-            g.subtype = EXTRUDE_TWO_SIDED;
+            g.subtype = EXTRUDE_ONE_SIDED;
             g.name.strcpy("extrude");
             break;
 
diff --git a/solvespace.h b/solvespace.h
index 84888c9..5490ac8 100644
--- a/solvespace.h
+++ b/solvespace.h
@@ -4,7 +4,7 @@
 
 // Debugging functions
 #define oops() do { dbp("oops at line %d, file %s", __LINE__, __FILE__); \
-                    if(0) *(char *)0 = 1; exit(-1); } while(0)
+                    if(1) *(char *)0 = 1; exit(-1); } while(0)
 #ifndef min
 #define min(x, y) ((x) < (y) ? (x) : (y))
 #endif
diff --git a/system.cpp b/system.cpp
index 7f9c729..df50b00 100644
--- a/system.cpp
+++ b/system.cpp
@@ -313,7 +313,7 @@ bool System::SolveLeastSquares(void) {
 
 bool System::NewtonSolve(int tag) {
     WriteJacobian(tag, tag);
-    if(mat.m > mat.n) oops();
+    if(mat.m > mat.n) return false;
 
     int iter = 0;
     bool converged = false;