jw652 Sorry was gone most of yesterday . I did not have to adjust the pump .The plunger I just cut off the plastic cup then soaked the end in nut blaster for 3 hrs. then put the alum. piece in a vise & was able to work the retainer brass piece off . It went pretty easy & then added the new seal so it stayed the same length . I'm sure Dennis at Baker Air Guns can answer any questions you have , he helped me out & is a great guy ! As for the trigger I left it alone I did take the cover off but just to see what it looked like . I was in uncharted territories doing this reseal so I wanted to keep it as simple as I could with no problems . The gun is a lot stronger then before & shoots good But not as good as my Sheridan blue streak . Darell