Micro Bowden and Single Drive Benefits

With a single drive gear + idler, this is pretty much what the filament looks like after the extruder, so we're using this natural curvature to make the layout more space and material-efficient.

Also with the curved path, we have a more controlled buckling behavior than a random one in an oversized straight tube. These things should play a role in the very good PA performance I'm seeing.

If and when we make a standalone version of this design that uses a common mounting pattern like the LGX or similar, the only thing that's up for debate is whether to use the same micro-Bowden geometry with the centered stepper location or go down the path of straightening out everything for better compatibility.