I am getting a lionel train set in O gauge. Southwest Disel freight or w/e its called. I was flipping through my friends model train book(he doesnt do it, but hes mom is one of those ppl who likes to collect some of them as clutter to put over her mantle) and there are some pretty sweet looking MTH cars and enginges in it. I was wondering as I expand and go nuts with the hobby can I run MTH cars/engines on Lionel tracks? (such as fast track or the 3 rail).