I've got an Uprising frame on one of my cockers. I think there's two versions, the older one requires a custom sized actuating rod (or, if you bought it used like me, you can just cut a little off of a standard one, and make a new bend in it), so that's kind of a pain. And mine sputters if I get to rippin' on it, but that's probably just due to my setup (I haven't put a high flow valve, or ram or qev's on it), or it might just need a fresh battery (I reckon I'll check the battery, and then buy a decent ram with qev's). Also, the stock switch is pretty stiff, I bought a lighter one, and then modified that so that it was even a little lighter. Before I did though, it was pretty tough to walk it at a decent pace. You may also want to bear in mind that they do not come with an eye (you could probably fit a Morlock in there, and then tap your body for beam-breaks, if it means that much to you). They really do rip though once you get 'em set up, plus they use your current 4 way, so there's no need for a solenoid and housing, and it's way easier to switch back to a standard frame should something go wrong with it. On the whole I'd say I'm pleased with mine, breathed some new life into my backup 2k1 'cocker.