Glowplug, the T-Pin method is what they called for in the instructions. I don't have any T-pins and thought the screw would hold better. If you think the T-Pin and rubber band is better then I will change it right away.

Also I have a question about the CG. I measured back 3.5" and placed a peice of tape on each side at this spot. I then put my fingers on the tape and lifted up the plane. To my surprize the plane seemed to be perfectly balanced. It did not drop forward or back one bit. Is this possible, could I have magicly got the CG correct without having to move anything around or add weights?