Hey Guys... Not much to show right now in way of pictures. Life has a way of getting in the way of doing my fun projects and CAD drawings take a bit of time to finish.
Here is a post of the internal chain and gears on the tandem drive. One overlook when I was designing this part, I failed to compensate for chain slack. I am not going to change the model any because of its complexity. Instead I will add a half link to the chain. This is going to be a little more then I want but it should work out Ok.