1. take apart, clean all grease off! 2. take seal on piston, SOAK in leather oil or non-detergent transmission fluid. soak over night and the seal will swell. will fit NICE AND TIGHT into compression cylinder. KEEP the leather seal as they last forever and putting a new seal will REDUCE your fps. short stroke you will be reducing with adapter and synthetic seal. 3. buy a maccari spring kit. comes with maccari spring tar and get some moly piston seal grease for seal and the piston. polish all and debur edges. be careful putting the leather seal back into chamber. debur and polish all edges. push in careful. the seal has swollen , you'll lose a little leather pushing back in ,BUT IT will be in there nice and snug and good for many years.
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