Hi Mike,
We had a Seatiger 555 on our CSY44 Walkover early on. It wasn't long before I sold it and bought an electric Lofrans 1200watt Tigres. Unless you are young and like lots of exercise you will soon tire of the manual windlass. And it is very slow raising the anchor in an emergency. But to answer your question see this link and scroll down to the photos under Anchor Locker and Windlass. There you will see the brown fiberglass mount under the windlass. We used a small plastic dish pan for the fiberglass mold, filled it with foam and then heavily glassed the bottom. The SS windlass mounting bolts go through the mount and deck. It kept the windlass base about 2" off the deck so sea water had a harder time getting to the windlass. That also gave a nearly 90 degree chain wrap around the windlass chain gypsy. Give the chain as straight a lead as possible to the gypsy and seal everything with good caulk. That worked well for us for many years.
