I'm not Bruce, but I installed mine myself. I t took about an hour and a half to get the closed primary off, and about two hours to install the open Karata, if you have the right size sockets and allen wrench sets. Mine was straightforward, I had a couple of questions about the stock rubber o-rings, and a call to Jim got me fixed right up. He will answer any questions you have, a phone call is all it takes. I have been running mine for several months with no issues. BTW, make sure you re-adjust your clutch pushrod after installation, it's not optional even if you have just adjusted it prior to installation. It WILL require it.