elmcannic Im certainly no expert, are you? Im sure your not on a forum for just giving advice. Surely you have gained knowledge and opinion from others since 2010.
What is more disturbing to me is working for a CET/ QEI that owns a registered elevator company and has never installed or serviced ever. Better yet put unqualified persons to do the work and figure it out on their own. I have worked along side "mechanics" with 10-15 years "experience" and they don't know where to start with wiring better yet read a schematic.
no b.s. I have 5 years experience, licensed, and do pretty damn good install/service. Certainly don't pride my self with perfection but I give my best effort.

Ive done a hand full of hydro seal replacements, couple telescopic twin posts (1 beings two weeks ago), 1 casket lift jack, and assembled 4 tradesman twin post jacks.
To reseal a jack in this area runs about 8-15k.(depending who does it) But facilities like this one would leave it running rough till an inspector or monitor writes them up.
Therefor I reach out to the community for advice and knowledge to attempt a bare minimum fix to resolve the issue.
I prefer to give the better effort but they don't want to pay for best result. You definitely should understand this part being in the field as long as you have.