As my Severn is now sold, I have put together a YouTube film of it's construction. The build blog is on here but I won't resurrect it as it was 4 years ago.
If you have 25 minutes spare, it can be seen here.
http://www.youtube.com/watch?v=dfFgzIDALAU&feature=youtu.beGet the kettle on and enjoy
Cheers
Ken