I would start balance at the center of the wing tube with wings off. You then may move the CG back to fit your comfort level. Mine is currently at the rear of the wing tube and I am still tempted to shift it a few mm even further back.
Regarding the Red Bull scheme, it looks like one from the limited number Sandor (digitech) had made a few years ago...
http://www.rcuniverse.com/forum/rc-j...ml#post9697222