I bought this with QEV's to replace my STO that died on me. Right out of the box I knoticed it has a larger shaft size and slightly shorter stroke. Gassed it up and "Wow", the movement is smooth and fast and runs at a lower pressure than the STO. Right away I got to adjusting my timing and am able to pull 28+ BPS. I have been using it for a couple years now and it has never failed me. As I'd like to have a rebuildable Ram with as long as this one has lasted it's not that big of deal.
Awesome Ram, Best I've ever owned and at a great price for the quality you're getting. I would recomend it to anyone looking for more speed.