I'm on a compact until I am 100% sure that my back is healed up from my surgery in June. My doctor has really made his opinion known about me mashing on the pedals....

eta- Lots of good responses, I really like BF for a resource.

eta (again)- Another great thing about this forum is that there is a member that had a used cassette he was looking to sell. Soooo, I will get to try out my idea without dumping a couple of hundred into a new DA cassette. I ruled out the BBB offering due to the many negative reviews that I read.