Steve, I modified some of the gears to add heat set inserts. This made it easier to lock them down to the arbors. I can send those to you or you could think about including them. I made the hole 4.1 mm in diameter and added some width to the shaft on a few to make stronger

I have finished the first build of the deadbeat version. I do think this is the best design that Steve has made. I have posted a video on you-tube. https://www.youtube.com/watch?v=WkqCkF6h8Ao&ab_channel=DavidWilson I have included pictures of the motor - I had a little trouble figuring it out.