If Wheelson's wheels keep detaching, here's how to fix it:
Check that the axle pins are fully inserted into the motor shafts
Make sure the wheels are pushed firmly onto the axles until they click into place
If the fit is loose, try adding a tiny drop of super glue to the axle before attaching the wheel
Refer to the wheel assembly section of your build guide for detailed instructions with photos.
If the wheels still won't stay on, contact us at contact@circuitmess.com — we can send replacement wheels and axles for free.