I really need a custom thread function (I design all kinds of bottle closures) where you can create a custom thread by sweeping a sketched profile along a helix without rotating or twisting. Something like this is now available, but you have to use a third party add-in that creates a approximation of a helix. When you use this "helix" you get all kinds of problems because of the inaccuracy of the approximated helix. The custom thread feature of Inventor or the helix function found in Soildworks (create helix from circle) would be fine!
