Workin on the coleman ct200u right now. Yesterday i added a secondary fuel tank to it to extend range. Then i cut my CVT cover to size installed it. I got caught in the rain so i figured i might as well put it on. I have a small youtube channel im working on right now called Garage Life. I do maintence tips, vlogs, restorations, modifications, installations and more. If any one is interested check it out.
Good luck with your Ruttman. I bought mine as a roller several years ago. It has the same cool wheels as yours. The frame was slightly bent when I got it, so we straightened it on the frame machine at my friend's auto body shop. The bike now waiting its turn for attention behind other projects. I hope the photo link works.