Wall roller for standing desk

This is a wheel that attaches to your table on double sided tape. It's designed to that your table won't rub on the wall when raising or lowering it.

You have an option to use bearing or to fit it with some lube. The bearing size is 7.8x22.8, common size of spinner bearings, so you can dissasemble your old toy to use it. It all should friction-fit nicely, although depending on your setup you may need to add some teflon tape to the rod until it fits snuggly. 

For ROD printing i recommend 100% infill. Other items will do just fine with 15 or 20% triangles.