Sliced with MatterControl Printed pieces separately on Robo3d R1+ Using: Hatchbox 1.75mm PLA Medium Quality Standard Layer Height (0.2mm) Raft Support Chased the the holes in the body and top and front of chassis with a 1/8" drill bit. Chased the front axle hole and rear hex-shaft holes with a #31 drill bit. Chased the holes for the idler wheels with a #44 drill bit. Chased the countersunk holes with an 82° countersink