I don't the reference for Cloake's 10mm, but it was 1975 that he was in
the process of replacing most all bottom boards. They had 50mm x 100 mm
runners, mounted on the wider side. And he had small tacks up in the
four corners. When you placed the bottom box on, they poked ~3mm in,
meaning the box was less likely to get pushed off the bottom board.
Nick Wallingford
Tauranga, NZ
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