I have created another old part. It requires one new primitive: 4-4con41 (included below) 0 Train Wheel Old with 4 Studs and Traction Teeth 0 Name: Untitled 0 Author: Niels Karsdorp 0 BFC CERTIFY CW 1 16 0 0 10 4 0 0 0 0 4 0 1 0 4-4edge.dat 1 16 0 0 (...) (21 years ago, 13-Apr-04, to lugnet.cad.dat.parts)