What a timely question! I'm going through the same thing right now with my Tipo/OS .61 FSR.
I bought this [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXZ667&P=7]Macs Mounting Kit[/link], and it will allow you to mount the pipe a couple different ways (directly to the wing/fusalage, or with a wing bolt). That might be all you need.

My question - my Macs header is curved at 90 degrees. This is too much of a curve. Is there a safe way to bend the aluminum header back without damaging it?

grim