I got some DEPO Black Housings for my 5th Gen, didn't have a problem with the corners at all. I just pressed against the corner with one hand then, screwed it tight so it would hold it flush...

The only ****ty part was the, drivers side corner started fogging up, ended up putting a tiny hole and blow drying it out then re-siliconed that sucker.

I would suggest you Silicon them before you put them on...to whoever has them out