It's kinda funny I posted about these cages on 9/17/07 on Psand. Dont know if the link will work on here. http://www.planetsand.com/forums/ubbthread...lves#Post705123 Not much exposure still. As for somebody not being able to compete with Calvin on cylinders that's not true. Calvin just happens to sell a very good product. For about 50% more than just porting you can get a new cylinder that rocks. If anybody had a slightly better cylinder or was 25% less expensive than Calvin... like your cages are compared to Vforces then they'd be very busy making them. I'll dyno a set if you want. I was thinking the carbon reeds would be better for a 11,000 rpm motor not the 2 stage. I even have a brand new set of carbon tech reeds I could try on those cages.