I built up a 250mm C-Beam linear axis using the bundle, and decided to see how much deflection there is. There isn't any play laterally, but if you look at "roll" (rotating the plate around the leadscrew axis), there is a significant amount of play. It's probably 0.1mm - 0.2mm, but when you add a vertical extrusion to the top of the gantry plate, this means your end effector is not going to hold position very well. When I watch the xtreme mini wheels as I apply force to the gantry plate I can see the wheels themselves shift, even though I have them tight -- possibly tighter than is recommended. Has anyone else experienced this and have suggestions for fixing this issue?