OK...yes, in a Turtle...best place for it!
Replace4s everything in the lower tube, all the heavy clunky moving springy bits.
So...all the ram needs to do..is move the bolt back and forward...which takes sod all pressure to do...so your lpr, can put out 40psi and should work great...the lighter the pump arm/back block and bolt/pin is...the btter...bung some of the Slik products on there (only have one full kit at the moment) and it will be even lighter...it meabs the gun will hardly move when fired, which means it wont bounce...even with silly trigger settings.
The IVG, is the nut used to adjust velocity on a standard cocker...some peoplew replace it with a rex kit...but the threads are all you need, with the IVG, to hold the valve in.
Also...the cocking rod, no longer moves, so slap that against your goggles and have fun! Its only there to help stablise the back block, and is supplied with the valve.