So I just put my Etha though the ringer at a local scenario game. One thing I noticed was how much this marker has ping. Seems like it was hitting very hard at times of firing. Thinking that the bolt was too tight or too far forward I backed it off and still has the same problem. I reset the borad. I am running a ninja adjustable 68/4500. Current tank setting 800psi. Any ideas how to tune this jack hammer down. Only thing I can think of is maybe the spring is too strong.