If I recall correctly, your hydraulic pump runs off an engine PTO? You have probably already done this, but be sure to keep the original PTO cover and bolts so you can easily remove the pump and cover the PTO pad. If you have any sort of major hydraulic failure, or even just a loss of fluid, you need to stop turning the pump, and the only way to do that is to decouple it from the engine. A lot of people zip tie the cover plate to the hydraulic hose right by the pump.
Good luck with the sea trial!
I downloaded the are you suggested and it looks like it will work well.If i set the gopro up to pick up the csrsmp in frame should i look outside or try to get the stabilizer display in frame.Just thinking of what would provide the best info.It would be a great education for the forum if you could document the results. With fins you can do this because they can be switched on and off in the same sea state. I could not do that with the rolling chocks because it take a haul out and a couple of days work to turn them on and off .
There are a few cell phone apps which record an artificial horizon, some are easily fooled by combined motion but some are pretty good. On iOS one called SCraMP seems like one of the best, very stable, and written for just this purpose. I believe it is free.
I'd love to see what the average reduction in amplitudes and accelerations
is.