good read... I also have an 07 GSA and an 06 HP2. I think when i got the GSA, I stopped riding the HP2 as often but fuel range was never an issue after I got the big HPN tank. Now I think I'll get rid of the big HPN tank and ride the HP2 as it was meant to ridden...unfortunately there is not much great offroad riding here in South Florida. Cheers!