Just for information,, I contacted an old plywood connection, Diamond Hill Plywood in Charlotte NC; asking about 5'x10' plywood,, this stuff must be really rare cause they are a mfg/distributor and they do not carry nothing in a 5x10,, however what they do have is 5'x5' plywood,, ina cabinet grade finish, and price is only about 21.00 bucks a sheet,, now thats to a retail seller so if ya have a frindly lumber yard that is not gonna kill ya on markup it could be available,, one nice, neat scarf and wala ya got yaself a 5x10,, now I am going smaller but for the gotta have more room guys out thar, here is an option,, just passing along info,,
chipper