Right now all I've done is side lock guns and they are all dropped assembled. I have a small bushing that the side lock screw goes through to act as a spacer as well as the rear tang screw. There is nearly always a small amount of warpage where the side plates attach to the receiver. No big deal and easily fixed. I aerate my quench water from when I start the bake until I quench which is roughly 2 hrs. I've tried both with the aeration running and not running at quench time and have not noticed any difference. I've tried distilled, well, and tap water and have had no change either. Currently running tap that has been in the barrel for 2 years and I just add to it. Next variable I need to try is temp. I've used ice water one run and didn't notice much difference but am wanting to try it again a few times to find a sweet spot.