diff --git a/web/app/canvas.js b/web/app/canvas.js
index ed985fc4..a7108ad4 100644
--- a/web/app/canvas.js
+++ b/web/app/canvas.js
@@ -609,8 +609,8 @@ TCAD.TWO.DragTool.prototype.mousemove = function(e) {
   var y = this._point.y;
   this.viewer.screenToModel2(e.x, e.y, this._point);
   this.obj.translate(this._point.x - x, this._point.y - y);
+  this.solveRequest(2);
   this.viewer.refresh();
-  this.solveRequest();
 };
 
 TCAD.TWO.DragTool.prototype.mousedown = function(e) {
@@ -618,19 +618,20 @@ TCAD.TWO.DragTool.prototype.mousedown = function(e) {
 };
 
 TCAD.TWO.DragTool.prototype.mouseup = function(e) {
-  this.solveRequest();
+  this.solveRequest(0);
+  this.viewer.refresh();
   this.viewer.toolManager.releaseControl();
 };
 
 TCAD.TWO.DragTool.prototype.mousewheel = function(e) {
 };
 
-TCAD.TWO.DragTool.prototype.solveRequest = function(e) {
+TCAD.TWO.DragTool.prototype.solveRequest = function(fineLevel) {
   var locked;
   if (this.obj._class == 'TCAD.TWO.EndPoint') {
     locked = [this.obj._x, this.obj._y];
   } else {
     locked = [];
   }
-  this.viewer.parametricManager.solve(locked);
+  this.viewer.parametricManager.solve(locked, fineLevel);
 };
diff --git a/web/app/constr/solver.js b/web/app/constr/solver.js
index 66e22704..6da67ac1 100644
--- a/web/app/constr/solver.js
+++ b/web/app/constr/solver.js
@@ -77,7 +77,7 @@ TCAD.parametric.System.prototype.getValues = function() {
   return values;
 };
 
-TCAD.parametric.solve = function(constrs, locked) {
+TCAD.parametric.solve = function(constrs, locked, fineLevel) {
 
   if (constrs.length == 0) return;
 
@@ -109,9 +109,21 @@ TCAD.parametric.solve = function(constrs, locked) {
   };
 
   var opt = new LMOptimizer(sys.getParams(), arr(sys.constraints.length), model, jacobian);
-  opt.init();
+
+  switch (fineLevel) {
+    case 1:
+      eps = 0.01;
+      opt.init0(eps, eps, eps);
+      break;
+    case 2:
+      eps = 0.1;
+      opt.init0(eps, eps, eps);
+      break;
+    default:
+      eps = 0.00000001;
+      opt.init0(eps, eps, eps);
+  }
+
   var res = opt.doOptimize();
-
   sys.setParams(res[0]);
-
 };
diff --git a/web/app/parametric.js b/web/app/parametric.js
index 36648b84..f1f4dcb0 100644
--- a/web/app/parametric.js
+++ b/web/app/parametric.js
@@ -9,6 +9,7 @@ TCAD.TWO.ParametricManager = function(viewer) {
 TCAD.TWO.ParametricManager.prototype.add = function(constr) {
   this.system.push(constr);
   this.solve();
+  this.viewer.refresh();
 };
 
 TCAD.TWO.ParametricManager.prototype._fetchTwoPoints = function(objs) {
@@ -189,7 +190,7 @@ TCAD.TWO.ParametricManager.prototype.solve1 = function(locked, onSolved) {
 };
 
 
-TCAD.TWO.ParametricManager.prototype.solve = function(locked, onSolved) {
+TCAD.TWO.ParametricManager.prototype.solve = function(locked, fineLevel) {
   var pdict = {};
   var params;
   var i;
@@ -226,15 +227,12 @@ TCAD.TWO.ParametricManager.prototype.solve = function(locked, onSolved) {
     }
   }
 
-  TCAD.parametric.solve(_constrs, _locked);
+  TCAD.parametric.solve(_constrs, _locked, fineLevel);
 
   for (var p in pdict) {
     var _p = pdict[p];
     _p._backingParam.set(_p.get());
   }
-  if (onSolved !== undefined) {
-    onSolved();
-  }
 };
 
 TCAD.TWO.Constraints.Equal = function(p1, p2) {