Coff:
I have a huge carton of RAF logbooks etc, I just have to fight off the resident spiders etc to get to it!
And I'm with you: it isn't a real Chipmunk unless it's got a Gipsy. Personally I'd love a cartridge starter too (think of the BANG - "look at me" effect) but I don't think CASA would play ball...
Cheers.