I have a number of the TMCC/RS Geeps from the late 90's. The later ones have diecast trucks, diecast fuel tanks and diecast pilots, and so have quite a bit of heft to them, and pretty good pulling power. I sometimes use a dummy and run the powered unit in the back with the motor in the rear, which sometimes results in a bit more pulling power, although these Geeps don't have any problem pulling enough cars for my layout.
Once the Pullmors get adequately broken in, they run quite well at lower speeds. An option to an expensive and labor-intensive conversion to can motors, and loss of the "sentimental value" of the original Pullmors, would be the installation of the ERR AC Commander, which has the option of 100 speed steps, and gives impressive low speed performance for Pullmor powered engines. Not cruise, but the next best thing for Pullmors.
Incidentally, these Geeps are the most bulletproof engines around, and sit lower and more prototypically than just about anything, giving a great look, not to mention having what are generally considered some of the best RailSounds out there.
No high water gaps here!
