What point are you at in the build? Harley has a web site for the GENIE and is a wealth of knowledge regarding the J2 as well, it is:
http://genie.rchomepage.com
If you have some more specific question, I'll be glad to help as well. I built one in 00-01 and flew it for the past several years. I really enjoyed it. It launches hard and flys well. Mine was pretty much stock with a vacuum bagged wing. It is one tough bird, never really had a fuse problem other than scratches, I bent a few wing joiners.
Kevin