I have written on the design of the racks and it is posted by JONA as a sticky on the Lee Enfield Forum on Gunboards.
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Here's the link
http://forums.gunboards.com/showthread.php?t=1418
Fu....., I mean, goodness graicious! Come on, you sneaked a pattern room pic in there didn't you?
No cameras in the pattern room when i visited. That blokes collection is amazing Breakeyp thanks to you and him for showing.
Alas, it's not even the Pattern Room now, and even worse, not under the control of the Ministry of Defence either. Just a civilian sort of a, well, quango as we call them in England