Chassis Wheel Set (recommended for Plus or Flagship models).
15mm thick aluminum mounting plates
I was unable to source casters with this kit, so you will need to buy separately. Price reflects the update. You will need casters with M12 threads. I am currently testing these in the 2" variety:
Locking casters on Amazon* Be sure to select M12 version, I have not yet tested to ensure that they are strong enough.