I've no knowledge of your particular system but do have questions.
Presumably a centreboard would suffer much greater damage in a grounding if held down by a hydraulic ram rather than just by its own ballasted weight.
To avoid that it might be built so that the ram lifts the cb positively but only allows the cb to descend under its own weight.
In other words the ram might move normally in cb down direction but not force
the cb down.
Benefit is that the cb can kick up on grounding and is more likely to survive, downside is cb can easily stick in up position without that positive lowering force.
Just like a winched system really.
Just theory, sorry
Haven't much experience with centreboards except on dinghies but did once help an owner make some tools to clear growth etc. from inside the cb trunk.
He spoke of gravel having once jammed the board when he'd beached for hull cleaning
Even heavy iron swing keels can be jammed by barnacles
Look forward to reading how yours turns out