Flip the chassis over and install the shorter brass standoffs as shown in the photo below.
Note:
The motor leads are not threaded here only for photo clarity. Keep yours threaded as instructed
previously
Use the two remaining screws to attach the caster ball casing to the brass standoffs.
Press the wheels onto the hobby motor axles for a snug friction fit & flip it again Charley! Behold, a very stable
three point stance foundation for you to build from.