LS6-b Maintenance queries

Hi all,

I am inspecting my LS6-b at the moment - a recent purchase. I have a few queries that hopefully others have come across previously. Any help appreciated!:
- I have partially dis-assembled the rudder pedals to remove the nose release for testing. There is an upper tube that the pedals slide along (which also supports the canopy gas strut) which is held in place with a large bolt at each end. The bolt was very difficult to undo and appears to be held by white threadlock. Should I re-threadlock and if so, what type of threadlock? Other bolts seem dry and some are lightly corroded, so that may be what I am seeing.
- I would like to remove the l'hotellier balls from the pushrods however they are firmly held in place (corrosion or threadlock). Is there a trick to removing? I am concerned about damaging the pushrod with a clamping force.
- The tail water ballast instructions refer to markings to determine fill level. I can't see any markings - how do I tell how much tail water ballast is on board?

Despite these issues I am impressed with the serviceablility of this aircraft. My previous experience is with SZD sailplanes which seem to require more work annually and double jointed arms.

Cheers, Ben