UltiMaker uses functional, analytical and tracking cookies. Tracking cookies enhance your experience on our website and may also collect your personal data outside of Ultimaker websites. If you agree with the use of tracking cookies, click “I agree, continue browsing”. You can withdraw your consent at any time. If you do not consent with the use of tracking cookies, click “Refuse”. You can find more information about cookies on our Privacy and Cookie Policy page.
I think it would be a lot easier to insert the ball bearings if this was the first step, before the wires from the limit switches get in the way, and certainly before the frame is assembled, so each side can be laid flat.