What they said!
Gary lives in the Upper Peninsula of Michigan---call it lower Canada. Given the prevailing weather this time of year, I reckon he much prefers to do something inside---rather than outside. Do yourself and him a favor, and send off your boxes. You'll be pleased with the results!!
He's done two for me, one in reasonably decent structural condition with a HUGE, horrible stain on top. It came back in merely EXCELLENT structural condition---and NO stain! The other was severely warped every place it had a place---with some warpage caused structural damage. It too came back---dead square--and perfectly sound. The even better news about all this is the repairs are invisible for all intents and purposes----never mind you probably know where to look.
It's worth noting both these boxes were THE boxes----for some high value guns from a loooooooooong time back---which is to say they were important pieces of cardboard!!
Ralph Tremaine