Never took my Sumatra apart, it worked fine and didn't see the point. I had my Career apart, or at least partially apart, pretty simple designs. Had a few other PCP's apart and I wouldn't say I'd do it just to see how it works. Start taking gas guns apart and start losing parts and damaging seals. If you do decide to do it make sure you dump ALL of the air first, even 100psi in the right circumstances can kill you. Don't know how you'd degass a Sumatra besides shooting all of the air out of it...if you use a pump I'd bet they are hell to pump up from zero. I'd avoid it unless it's broken, just my $0.02