MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
I used the 360 version but it should still apply
The wheel feels too high to be ergonomic.
The bearing is quite loose without glue, I would design it in place, where you pause the print, put in the bearing and resume. Or make a slot for the bearing, hole in frame and longer stem for the wheel so it would secure it.
Other than that, pretty cool design.