Every dcc decoder that I know of has a default address of 3.

Did not think of using a lionel combine for the M1, that may be my next project. 

I would appreciate it if you could send me a photo of you're motor car, here's my email: ebtmike@gmail.com

I received a ON30 bachmann combine for Christmas and have plans on converting it to a motorcar, sort of like the EBT M-1 (not exact of coarse but close). Any suggestions on powering the car? I know backwoods miniature makes a conversion kit but I rather not have to go through overseas ordering.