At 80 mpg, my CT goes on reserve at about 40+ miles, and is empty in another 15. On ebay I bought one of those motorized bicycle 2 liter tanks for $20 including shipping. I set it on the bike to get an idea of how it'll look. It'll sit about an inch lower, once I cut the studs and make mounting brackets, plus painting it to match will help as well. My feelings are mixed, I'll get another 40 + miles, but it still looks a bit goofy to me. Opinions welcomed.