Hi guys. Everyone knows the ppqm2 is a great pistol. I took advantage of the new promotion and won’t be giving it back. Today was the first time at the range with the new gun. My only problem is with my thumb knuckle..it’s hitting or slapping it during recoil.... do I need to change grip or try different blackstrap. I never had this problem with my Sig but I’m a noob to Walther (happy noob ) Appreciate your help.