http://www.youtube.com/watch?v=cUavdrSN ... ure=autofb
And here is the answer, picture form of course:

The only real trick here is to use a 1/4" drive 1/2" socket instead of a 3/8" drive. The reason this works is the 1/4" drive sockets have a thinner sidewall. For the record, I am using Craftsman sockets. Beneath that is a 1/4" to 3/8" drive adapter, then a 3/8" union, and the 3/8" extension. Now, you might be better off with a 1/4" union, especially for #3 cylinder, but I didn't have one.
Here is a pic of my collection of sockets on the #3 cylinder:
