Almost there. While assembling the new 3d printed custom 2060 mounts I realized the bearings needed to be close to where the motor belt connects to the M8 smooth rod via that 20T gear pulley, otherwise it can flex that M8 rod too much. I redesigned the 2060s to use T-nuts & made a separate part for the idler bearing mounts. That way I can put them as close as possible to the motor gear.
Might could just use 1 bearing there, but 2 will give it support on both sides of that 20T gear pulley & that is what I have done on the outside wheel gears.
This should work better. Here is a view from underneath the plotter.
