Maybe this has been discussed before but here goes...do most of you use the standard size backstrap that came on the P99 or have you experimented and changed sizes? I laid off a few months shooting competitively and returned the last few weeks and my grip is horrible. My thumbs are flopping everywhere...now maybe because I haven't been as deligent in practice but one guy noticed that he didn't think my weak hand was making enough contact with the gun...and this is true with the medium size backstap. Now I have a RED gun that I use for practice at the office and it is molded after a P99 with a large backstrap. With this pistol I can make better application of my weak hand to the grip....I was thinking of changing out backstraps to see if it makes any difference. I consistenly find myself pulling shots to the left...trigger pull? Maybe...but I am wondering if my grip is just not what it needs to be....any comments?