I'm leaning toward putting my hydraulic hauler on top of my starboard washrail primary use is for retreiving anchor line any advice or pictures would be apreciated I've seen most use a ss or other metal wedge
We've done haulers mounted on the washrail before, some where the disks were facing inboard (primarily for lobstering) and some where the disks were facing outboard (for hauling anchors).
For the inboard facing position a simple box was created on the washrail to house the hydraulic motor and hoses. For the outboard facing position, the backing plate went right on the side of the cabin, with the line going down into a box built under the washrail with a hatch.
Black dot is the access hatch to the hydraulic motor on the black boat.
You should wrap all of your hydraulic fittings, including the ends of the hydraulic lines (after they are assembled), with PetroWrap Anti-Corrosion Tape (link below). My Cat dealer uses it and I bought a roll from him. When it comes time to disassemble for any reason, the fittings will look like new. It will also keep you from having to replace lines and fitting prematurely. I use it on all of my hydraulic fittings, even in the cabin. Don't forget the ones on your steering ram if you have hydraulic steering.
This is what I did for my anchor hauler. Simple aluminum bracket thru bolted to the wash rail and the hull. Portable davit from EMT into my swivel rod holder. Oh yeah and that's my mate working hard. (Fishing mate !!!)