The size limitation seems to be related to the Fedex voucher. My bill of lading from 2011 had the size limit pre printed on it. Anything oversize or overweight can be billed at a higher rate. The absolute height limit for fedex express freight is 70" Ground freight can be taller.
The 1/4' you might get away with. 1" height is pushing it. Better to rebuild it undersized. While I do not see it changing, the 2013 crate dimensions could be different. After all is is a water game.
