You could save yourself a lot of time, money, and effort by just installing a set of clamp-on aero bars. Without them on my utility bike, I'm good for maybe an hour of riding at most before my hands start to quit. With them, I'm happy to do 4 or 5 hours, and have done so often. In fact, that's now the bike I use for training in cold weather and on rainy days. Average speed is higher, too.