And make sure all your bolts start off loose not snug. This works just fine with loose hardware, I only tighten things up if I have issues. The longer bolts on all the parts control tension on the rails ( a little bit). If a bearing has plastic on both sides of it loosen it up and see if that helps. But, no, generally it won’t glide from side to side freely, it should not stop right away either but not butter smooth.
Reply To: how smooth does x and y need to be?