SkiDad, Jiggs and JerryJerry, I got those O-ring (the real little ones) for the trim/tilt valve to replace on those two little check valves inside. Works great. Trim/Tilt runs like a scalded dog!! Holds position and won't leak down. Those troubleshooting instructions you wrote are right on the money. For all seals and everything I fixed the whole deal for about $25 and that was only because I needed to get a pair of those plastic trim fastener removal pliers to take the spools apart with. Otherwise I spent less than $5 on all the seals. Oh by the way, I have spare seals that go on the check valves (that cause the leak down). They are very cheap, so if someone else on the forum has a trim/tilt leak down issue I'll throw a few in an envelope and mail them to them. I'll never use them all.