I think he's saying "mind the jet".....
Yeah, I too rebuilt one. Does it also creep down if you sit on the leg when it's up? It took me something like a weeks worth of evenings to do the whole "trim up - trm down - add fluid- repeat" cycle & fully purge the air. Every night I added less & less fluid until it finally behaved itself.
You might be surprised just how frothed that stuff gets if there is air in the system.
If you can't get more fluid in & it still does this three thoughts in my head are:
- Have you tightened the manual release valve enough? - I was amazed just how tioght in mine needed to be. (and if you have replaced it have you used fluid compatible O- rings? - "standard off the shelf" O-rings will go brittle in a matter of hours on contact with the oil)
- Is there dirt in the system?
- Have you put the pressure relief valve back together the right way round? (don't ask me how I know that's possible....