Well I am finally getting around to another build, and after reading a bunch on here I thought I would go with the sprocket adapter, but can't find any in stock. Are there any available? I sent a email to Pirate Cycles, but have not got any answer. I built a couple of bikes with the rag joint, and the last one is still running for the old fellow, but the clam shell looks better. By the way I am building a Raleigh 6 speed comfort bike with a 66cc China motor.The bike is 2 years old and has never been ridden, and even then I found the back axel bent, so off to the bike shop for a new axel. It was a bike sold by Wal Mart. It will be used for short trips to work and the store. I will get some pictures when done.