Quote Originally Posted by JAZZCNC View Post
If you want the best machine then you must bite the bullet and go with Profiled linear rails. If not then you are wasting your time worrying about things like COG or plate thickness because Boyan is 100% correct that the machine is only as good as the weakest link and round rails will by far be the weakest link no matter which axis you put them on.!
Sorry for being a bit unclear, with "full hiwin" I meant as opposed to the "economy" type profiled rails. I've already been convinced to go profiled, although I expect to swear a few times more than had I gone with round rails...