Sea Dek is great, but very pricey. The marideck is very nice (and much cheaper), but I'm going to coat the swim platform pads with some non-skid clear coat. The pads aren't too slick now (much better than Chap's OEM non-skid), but they could use some refinement. I also have to caulk around the pads as the backing is cotton. I am also looking into adding a swim platform, but keep my boat at a dry stack and don't want to pay more per month for storage. Thus, I'm looking at building something custom my self that can swivel up when in storage to keep my costs as they are now (since they charge for everything they can lol). This is an ocean boat in south Florida, so the marideck and all the upgrades/repairs I'm doing are to waterproof the boat and improve its reliability/performance. Love your build, that gelcoat looks OEM! My only beef with doing something like that is over time non-skid gelcoat degrades and is hard to keep looking new, where as the Marideck is so tough I can drop a hammer on it and it doesn't leave a mark LOL! It also hides stains really well. If I were you, I would consider adding snap in carpet (like Frisco Boater did) or faux teak to finish her off. Either way, you now have a beautiful, big bowrider! Join the Chap forum as well, lots of guys over there have gone the Sea Dek route.
p.s. you may be the best boat electrician I have ever seen. My wiring is so amateur compared to what you've done LOL, but it still works. That ACR is a great feature and the PO did it on my boat as well. :facepalm: