Posted 03 August 2013 - 09:08 PM
George,
You are not alone; the two-piece motor box was a popular alternative for many builders, including pro builders like TonyP.
Others solved the problem by not using any motorbox at all.
Without question it is for me the bending tool and the precise bends it can form that makes the one-piece motorbox a practical reality; without it I too might be building with two-piece motor boxes. 
Steve Okeefe
Slot car hobbyist since 1962
Scratchbuilder since 1967
Senior philosophunculist
Arguing with an engineer/expert/specialist is like wrestling with a pig - everyone gets dirty, but the pig loves it.
"I learned years ago never to argue with a specialist, but I also learned that history has a long list of specialists...who were dead wrong" - R.A.H.