Button cut too low to mount even when filing - NcSTAR AK Keymod Mount Receiver Cover

There was no real suggestions on how to mount this besides it would need some 'filing' so, if you cannot get the measurements right, or you file the button too big, you're out the money. I'm fairly handy, and tried to compare it to my dust cover I was replacing with measurements and wasn't off by very much and still failed to get it to snap into place. I'm not going to attach wires or rubber-bands to MAKE it fit using guerrilla gunsmithing. Do some research and try to find what sort of mounts are suggested and spend the extra 50+ bucks. Unless you're ok with some disappointment.