i have a tippmann 98 , and i have had it for over 8 years now . i hadn't used it in a long time , but i always kept it lubed and serviced . i took it out the other week for a game , and it couldn't get over 230 FPS. no matter what i tired . im shooting with HPA . i was wondering if maybe i should replace all the internal seals ? any help would be appreciated .