ok, I get it... If I was running a PG setup, I'd see ZERO point in running one. There's no way I'd run this sled at 8psi & use the PTP to get 10, I'd just set it at 10. If you can only run it at 8 safely... the top of a hill is the LAST place you want to push it & squeeze a little more out of it... just to see if it'll POP!!
With a RG setup though, it makes a lot more sense. Maybe I'm just a pu$$ for not running 15psi constantly, but good god my arms would be beat so much faster at that PSI!
Suspension has a lot to do with it as well, as you increase 50 or whatever hp, you need to change settings, but I like the sled set so it pulls the skis about 18" at 10-11psi so the front feels light, that same setting puts it on it's tail at 15, to put it so it stays down at 15 would make it much heavier at lower power.
oh btw, I've got nothing against bd's TURBO... it's the box that's attached to it, and the customer service regarding that box... that I don't like. Like said in another post though.. IT'S ALL in the installer, THEY make or break a kit. IF your installer can set you up so you don't need to touch the box... you'll love any of the kits!