The indy bolt already has orings on it. So there really isn't much point. If you play around with the orings on the bolt and get some softer ones that fit just right, you can probably scrape up a few more FPS for free, if that's what matters. Otherwise, there isn't much to gain.
ETEK 3LT, with 14" Ti boomstick and cure 3 + bolt F/S
Vanguard creed eyes, membrane, bolt pin, detents, gaskets, schraders, orings and more F/s[/color]
Old school angel poppets/cup seals(LCD and A4/speed), spring detents(not sure which models) F/S