Spindoc, From the description is does look like you will need a further aft CG (more tail weight). Look on the Horizon site for articles by Mike McConnville as follows
http://www.horizonhobby.com/air/archives.asp

Jason Shulman's tape "Defying the Limits" is another great source as well as well as Frank Noll, Jr's tape "The Art of 3D".
Frank's tape is available from Carden Aircraft. Not sure where Jason's is available. The package has the following information:
Robin's View Productions, PO Box 68, Stockertown, PA 18083 and a phone 610-746-0106

Hope this helps,
Bill