Hello was looking for a sub 6lb truck gun that can come with me on long hikes. I think i want a Benjamin and was wondering is the discovery different from the maximus in any other way than slightly longer barrel and synthetic stock? Also is the fortitude just as accurate as the disco and maximus? Could I take out the reg and put in disco spring and run it on 2000 psi? I like the 2000psi fill option because I run a hand pump in the back of my car. Thanks guys.