craZaboutplns: I have the smaller brother the 65" CMPro Extra, which is the same as the GSP 65" one, and it recomended the same set up, and i was a tad worried about being tail heavy also.. however i decided to go duel elev servo's instead of 1 and the rudder is mounted in the tail hatch as with the 72".. i also ran 4*40 push rods with metal clevis' on the tail instead of the 2*52 with nylons they supplie with the kit.. running an OS 1.08 with bisson pitts, 15*6 and metal spinning i came out nose heavy by a bit. Even despite the added weight i had in the tail with the extra servo and thicker push rods. I ended up having to make a custom hatch and mount for my RX batt in the tail and this helped a lot but i still needed about 60gm's in the tail to balance it out.