thanks so much for the advise. I may play with tuning the hammer spring. it should be a fun project. as far as poi. it seems to start off high left by about 2". as the shots progress it comes back. if I remember correctly it was at about shot 15 (816.4fps) about 160bar and stayed constant until I stopped my string (801.0fps). mind you I am only shooting at 21 yds but I can keep my groups to under .5".