thanks for the feedback! that’s one area I may go back in and take a look at when I get some time… pulling the coils in further / changing their positions, changing to a single coil design (which would be sick if the bolt could fire from inside the diameter of the coil)… I also may take a look at firing from compression rather than tension… engineer friend of mine seemed to think that would be less wear on the springs. I also want to explore dampers on the springs… like on mountain bike shocks.