All this work on the chassis will be to no avail if I can’t solve one little problem. The motor won’t go in the body. Hmmm.
Hopefully (I haven’t done it yet) all I’ll need to do is remove these lugs. I think they are meant to allow you to mount the motor horizontally. Can’t work out why you’d want to do this though as the gearbox is taller than the motor in the vertical configuration so there’s not height benefit.