That's a nice gas tank for sure. I was wondering why it is angled as it is. If the filler were on top rather than at the side there would be a whole gallon capacity. As it is it looks like maybe 3/5 full is the most you could go. Is it so that you can swing your leg over the seat more easily? Really nice build. The motor is a dream. Personally I have no desire to go over 35 on a bicycle and even then only when I'm feeling fiesty. Sounds like the springer is a good idea and the best helmet money can buy is also a good plan. At 50 mph I think body armor would be wise. Of course I'm an old fart, so slower is better. If I were young and hadn't broken anything yet 60 would sound good. Ha. Stay safe, have fun, great bike!
SB