Regarding the F-M demonstrator paint scheme:
The Lionel demonstrator models that I've seen at shows are beautiful in terms of detail and graphics; although, to me the orange color seems a bit dull. I don't know anything about the mechanicals or electronics; however, Bob2 stated above that only two axles on each truck are powered. $750 may or may not be a fair price, but I'm already committed with the two K-line models, so I won't be lightening my wallet to get two more and then starting over with 2-railing them.
Ten or 15 years ago, MTH also made a Train Master in the demonstrator paint scheme with QSI electronics. I found one on ebay for about $100 and bought it to use as a guide for masking and painting, as well as to scan the side for making a decal from the "TRAIN MASTER" graphic, all of which may beyond my capability. Why not just swap the body shells? you ask. Because the MTH body is a knock off of the 1950s Lionel shell, clearly a step backwards. MTH has since come out with a with a much better detailed version of the TM. From the pictures, they look to be as nice as the K-line and Lionel, but I haven't looked at them first hand. I don't know if they have put the demonstrator paint scheme on the newer version.
