ok? would it be safe to assume that the pgm II is the 3D unit that they talk about in the model history part? andy does the 18 servo motor mount like the sixteen or the 21? samk has a pgmII and harness, can you think of any reason why this setup would work on my eng 16 if i get the 18 servo motor unless there is something else i would need? i want to try not to have to graft anything in.... OK i just went out and looked and i DO have a servo motor with mounting like the 21 _________________ DAYTONA SPECIAL,74 RD350 LONG ROD, 2 RD200 ELECTRIC'S,88 NSR 250RG, MICRO SPRINT CAR W/CR 250 ENG