Hello , I have a Maverick VP , .22 cal with a 600mm heavy liner to shoot slugs .I put a power kit with a 14 grams hammer . After changing many times the hammer weight, regs pressures , preload screw lenght...I'm a bit lost and it seems that all these changes put the system out of balance. Actually my 1st reg is on 130 bars , 2d reg on 120 bars , hammer weight 14 grams and preload screw is 6mm out. Despite this I cant' achieve the correct speed to shoot 30 grs slugs , which should be around 930-950 Ft/s . Moreover , when I decrease the hammer power wheel the speed increases ......something must be wrong , but I don't understand what . Thanks for your help .