I recently acquired a Flashpup, and I would like to lower the velocity a bit as I do not need maximum speed for my backyard. I thought I would be able to get a few more shots per fill at the same time. I was going to try to adjust the valve (hammer?) spring as that is the easiest but cannot figure this design out. I am used to my Marauder, that is a straight forward design. Anyone have the knowhow with this gun to tone it down a bit? Could use some help please! Thanks-----