I stumbled upon a website that serves the world of modelers but has a heavy emphasis on scratch and vintage building. Being of a certain "vintage" I found a lot of memories.

I have uploaded some scans of plans I have found.

There is a very useful section in the forum of workshop techniques.

Lots of good stuff, on aerodynamics, scale, indoor, outdoor etc.

Enjoy

http://www.hippocketaeronautics.com/hpa_forum/index.php

The best thing is, it is two Canadians who run / own it.