Originally Posted by
tony gray
It's fairly obviously just a 'quick fix' to enable the fitment of a wider range of bodyshells because the M03 still has severe limitations in that area as we all know.
Thats the problem, Tamiya are known in M-Chassis for keeping 1/1 realism, if a real car is FWD, then the RC will be FWD....but what FWD cars are out there that need a low nose chassis, AND are proportional to need an M-Chassis? Kei sportscars (Nissan Figaro

) at a push? I can't think of many. Most like HPI's Datsun 510 and 240Z (if Tamiya made their own versions) would go on the M04M already.
Having said that, with a different length steering rod, I guess you might be able to mount the steering on the M05 at the other end to make it RWD?