I have a spare Quaife with planetary gears that I ran in my GTP for a few weeks and I'm not sure what to do with it. I bought an early Quaife when they came out. But it needed some modifications to get the planetary gear pins in. The holes were too small and the pins needed to be shortened. But we installed it. And it didn't have enough of a taper to easily release it from the compression ring on the output shaft. They eventually sent me a new one with some updates and I still have the original. I'm not sure I would install it for a lot of miles without being inspected, but if anyone is interested, let me know. I feel bad scrapping it.