R2D2 charge port servo opening

MrBaddeley created a mod for his R2D2 project to have a charging port slot with a door. Unfortunately he makes the door movable just by hand and it's not automated.

This is my small upgrade to use a micro servo to act on the door.

Just use my MB_Ring2-1 modded file insted of the one from the original mod, the servo holder, the hinge with a hole and a paperclip.