It's looking good. My US has a 91 os surpass and I used a 14oz tank. I just changed to a 12 because a 12min flight also had lots of fuel left over so I cut down on the size. This plane flys good with a pretty wide CG envelope I would leave the tank mounted up front unless I had YS engine for it. I don't like header tanks. I don't notice any differnce as the fuel burns. I did fly a 120 size with a ST 3000 and it carried 24ozs. You did notice that as it burned off.