I have a IR SSR7.5ep screw compressor at my shop. Lately the compressor is occasionally bogging down right before unloading. The compressor has 25000 hours on it, I was thinking of rebuilding the unloader valve and air end. I have some experience with rebuilding roots style blowers, and I am familiar with how the air end works, I just never tore into one before. Is there anyone here that has some experience with air end rebuilds that can attest to whether or not this can be done without a collection of specialty tools.