Lots of folks have asked me for some more information on my homemade DIY Transmissions that I made for running accessories at different speeds from the variety of Model Engines that we run. The ball bearing race hint that I mention in the video is really important for our very limited power wise model, toy steam engines, Stirling engines and Hit & Miss engines as any power robbing friction that we can eliminate is very beneficial.
Hope this video helps, if not just reach out.