Doug's drives were bullet proof and he generally reworked or swapped out early OMI for later OMI gearboxes, he definitely installed new universals & shafts, but as noted above, everything else was new. His models would run very smoothly with great slow speed operation, with a little gear head whine at higher speeds, but they could pull the wallpaper off the wall. I owned several OMI Turbines with his drives installed.
Doug's drives were built very stout, but dated by today's standards and a little unsophisticated when compared to the drives that Jay installs. Where Jay's are fine sports cars, Doug's were Pick-Up trucks....very functional and strong, but not real pretty. But, in all fairness, it was a different world back in the 80's & 90's for custom drives.
You're models should run forever!
Butch
