Smoke was added by MTH as an improvement in recent years to RK diesels and the Premier VO-1000 unit shown above. Nothing to do with room, all shells are basically the same. It's a long plastic shute from the stack to the smoke unit on the VO but it works great.
M logos can be obtained by Greg our forum member or can be printed out using photo paper with the PC. A square sheet with the M logo LONG ISLAND can be glued to the cab and front sides using 3M spray adhesive. Easy fix.
$350.00 for a logo less RK engine, the least MTH could to is add smoke. Tell Rich we want the smoke added.
http://mthtrains.com/30-20194-1 no smoke