In my last post I neglected to explain that the screw hooks are fixed to the bottom board with nuts and washers, the nuts on the bottom being countersunk into the board so the bottom board sits flat on the base. The screw hooks in the top board are loose in their holes and each has a washer and wingnut. Once the top board is laid on the stack of pads each length of chain is attached to the hooks in the top and bottom boards with as little slack as possible. The stack is then compressed by tightening the wingnuts evenly on both sides.
Now go and do thou likewise!
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