The big shortcoming of the Powermaster Prime/GG mould was that there's nowhere to put the head when you have the trailer configured into base mode. Of course this wouldn't be a problem if the head could become Roller...
It would be neat if they could engineer it so that the Super head and the regular head both lower into the torso, with the regular head inside the Super head. Then in regular robot mode, the regular head comes out, and when you go Super, the bigger head comes up/out and encompasses it (or the regular head goes back down, and the Super head comes out with the regular already inside).
I always had a specific way of laying out Ultra Magnus' leftover armor when he was in truck mode - I'd put it all on the top deck of the trailer. Couldn't take corners very fast, though.
Hmm...
The chest piece, I just kept in place. If I'd known the head could attach to it (
thanks, Hasbro), that would have helped. Waist, I either kept attached or had both in place, since it formed the trailer hitch as well, and then just set it aside in robot mode instead of truck.
That leaves the fists and gun. I guess I put those aside.
I think if they didn't cover the screwhole with the faction rubsign, the gun might have fit there?
As for the fists, maybe if the missile launchers could attach to the sides of the trailer like in the cartoon, I might have just put the fists up in front of the trailer. Kinda be a proto-PMOP/PotP Rodimus that way.