PCB Anti-Flex supports

[NFG]

My Raiden Fighters Jet board died recently, probably a result of board flex.  The first time this happened I could have it repaired, but the second time it was totally unfixable.  Since games aren't getting any cheaper, I wanted to protect the board I bought to replace the dead one, and so I've created a system that will lock it down and prevent as much flex as possible when swapping game cartridges.

It occurred to me that the front edge, near the JAMMA connector, could do with some reinforcement too, so I whipped up a quick li'l support that holds the edge of the board in place where there are no mounting holes.  The base of the PCB will be held 15mm from the mounting platform.

Update: Now with 15 and 20mm PCB heights.