Ive finally got around to finishing them, and have posted the files below. The crank shaft is a little wobbly on the V8 model (the tolerances on the thin lift arms and axles are not ideal) but it does work at full power from both a PF M and XL motor. Just be careful. Whilst I would agree that they dont look perfectly like the EMD units, kids certainly find them fun, and they are still smaller than the standard technic engine units.
V8 Unit, slightly different
Edited by roamingstudio, 26 January 2011 - 07:49 AM.