It will still jagg if the mouse is to fast.
How more dense sprite3 how smoother.
R0J0hound has made a MUCH better physics plugin with better joints.
But if i use a plugin, he aint opening my capx.
With his plugin you can make the joints pull depending on the speed of the mouse.
And another plus: framerate is not dropping at all, it drops when u scale, position & rotate towards.
You can, ofcourse, make the mouse invisible with a transparant sprite set to it.