UPDATE TIMEEE
now had engine for a few months and wow
What can I sat but mancraft nailed this engine the initial messing about with nozzle alignment was a pain but wow was it worth it the consistency on this is immense I've had 10 rounds through the chrono with a difference of 2 fps between highest and lowest!!
I've got this tuned to 95psi kicking out 311fps at its highest and my site limits max is 313 fps on a .32g for dmr so I'm literally at the max and the consistency of the engine means I'm always set for chrono on game day.
They are thar good I also picked up there v3 engine and its the exact same so if u want this in any other rifle they are perfect at the same regulator settings I'm getting the exact same results no different so if you have another rifle and want a mechanical engine get mancraft !!!
My pp19 is now also a pinger but I tune down to rifle limits rather then dmr and run around 70 psi with the small turn of my reg key and im all set
In terms of v3 engine install it was even easier I took original nozzel out of pp19 and put that one onto the mancraft engine and put engine into original shell dropped it bsck in and was all set !!