Pretty disappointing - Pro Mag Archangel Tactical Shotgun Stock System for Mossberg 500/590

I had to modify the forend with a dremel in order to get the trirail section to fit. It had too much contact with the magazine tube and then it even made too much contact with the castle nut. It took about an hour of fine dremel sanding to get it to fit. The stock didnt last too long either. I have less than 100 rounds through my mossberg 500 and it will only stay in place on the most extended, and least extended slot. If you have it one, 2, 3 or 4 clicks open, you can high five your stock and it will completely collapse. I havent even shot anything bigger than a 2 load, no buck shot no slugs