i got a mk1 airsporter and took the spring out - it was a bit bent so i got a titan one i know i should cut some off it but of course i tried it full , it took some pushing in but power went down by 30fps with it full length and but it sounded real powerfull , i know lots of people will have done this so i am asking - what have people found the optimum length for cutting these for the airsporter ? i dont want to cut too much off and spoil it , i am not sure how it could be less powerfull with the stronger spring - perhaps it expands less fast when its too compressed ?