I think flywilly did a set of templates and drawings...I think I have a copy of them but will have to check for sure...

I have one that is about ready for glass and paint...I also have a kit so I know I have the drawings for sure...(kit is not for sale)

I will let you know when I round up the info...

Here is a little thread you may like...
[link=http://www.rcuniverse.com/forum/m_8969695/anchors_8970158/mpage_1/key_/anchor/tm.htm#8970158]Skymaster[/link]

Chuck

P.S. I have several Skymaster headers now but cant remember if they are OS or YS?? In case you need one I think I have about 5 of them...