You can also increase the volts I suggest lipo batteries for this but if you go to big you can run the risk of burning out your blaster then you will need to replace wiring and micro switches that can be gotten online at reasonable price sometimes exact matches aren't obtainable but you can rework the mounting positions and make them function

precision set of screwdrivers are a must for what your trying to do

remove air restrictor change o rings re lube air cylinders. if you want to spend some money change the spring as well and upgrade it to a stronger spring with more pounds