Ken.... you may personally have the body build to facilitate this... it is tight... I imagine someone with a very small frame and very long arms... and fingers that are about 15" long might have an easier go at it. Bill stated that it was a real "b**ch" of a job and he was a gentleman.
I haven't done it... I can only relay what I have heard from others. Cliff Wilewski took a look at doing this on a customer's single... came back with... "very, very, very difficult."
Jim