Well made brace unfit to ak47 hellpup pistol - SB Tactical SOB-47 Pistol Stabilizing Brace for AK47/74

I was very excited unpacking my long waited Hellpup AK47 pistol brace. Very well made product!!!! Except until when I start installing it on my pistol. What happened? When I started tightening pistol grip screw I saw ugly gap in between back of pistol receiver and brace bracket. Huh? Problem is that brace bracket is made exactly 90 degrees, but bottom side of pistol receiver (like any other AK type receivers) has LESS than 90 degrees from the factory. I couldn’t believe that folks developed such a good product overlooked that moment. I’m not intending to alter any geometry of this product and probably should live with this ugly gap and out of line shoulder brace. Total dissatisfaction!!!! Hope people who developed this disappointment will read this post and will fixed this problem in the future.