Benjamin fortitude hunting tune?

Hey fellas I was wondering if any of you guys have taken the regulater out of the fortitude and or opened up transfer ports etc. Heres why I ask. I love lightweight guns. I have a 7 year old and I like to have guns she can work with too but even if I didn't I like lightweight guns with open sights. I would really like 80 to 150fps faster than fortitude provides. I was going to get the disco or the maximus but the multishot has me willing to give up the open sights and get a reflex or something. What kind of power and shot count have you guys gotten by taking that reg out and such. I really don't mind 177 or 22. 
 
looking through all the Mods here and other forums, the Fortitude is Not a great Platform for Increasing fps. I like mine at the stock setting, but increase the Gen.2 hammer spring setting to maximum of 6 turns, for a few more fps, and or shoot a Lighter pellet like a Preditor GTO pellet, they are 11.75 grain in .22cal or get a Marauder, but you loose the Nice Light rifle.