I wouldn't mind, unless it turns out 25% or more of the boards aren't combatible.
About the tubing cutout discussion, it'll probably be too expensive but oh well:
So basically a steel plate with two holes for screws. It could be used on the outside or the inside, although it would look "stacked" on the seperate rear bracket when on the outside. But it could be an all-purpose plate for I/O or the power button even.
I like this idea and we could also punch some letters / serial number to it