Will that amount of force to mount the MKII be safe for a motherboard in it's case, or should one remove the motherboard, and mate the parts (for life) on a flat surface, say a table...?
I'm guessing it's going to be safe enough to assemble, but it should be asked, the amount of force needed really is a lot by the looks of things. Should keep it from getting unstuck.
Also, the 4 holes in the laminated board, are they to stay? I'm thinking something along the lines of sticking something like builders glue (PL400) heat glue, or something there to really make it permanent. (trying to remove it after tacking it in place with PL400 likely means tearing and shredding of your hardware)