Need a swim platform

You might look at other solutions, too. TNT Lift (hydraulic swim platform), Freedom Lift, etc.

Not inexpensive, but some of those address launch and recovery more betterer than many davit systems on a simple swim platform. And they also don't (always) actually give you a useful swim platform.

Note there are issues associated with carrying a dinghy on your stern. Boarding and departing from a swim platform when at floating docks, crossing stern lines at docks, coming down off plane, obscuring transom mounted stern lights and name/hailing port markings, etc. Nothing unsolvable, but needs mitigation...

-Chris

Make it... the platform Is the easy part... 1” coosa board with glass on each side. The hardest part will be the brackets but any good welder can handle it.

I really meant have it made. Any fiberglass shop or yard should be able to

How big a tender do you intend to put on it? Have you considered putting it on your bow? You're not just taking about a swim platform, but most likely one 4'-6' deep unless you're talking about a small dink to lay against your transom in which case you might be better off just loading it into your cockpit . If larger might you not be better off just towing it. Hanging the weight of the tender, plus the weight of a swim platform will certainly affect the handling of that boat (including backing down if you fish). It could in fact keep you from getting on plane. Before proceeding I'd load the total weight of the tender and platform into the back of your cockpit (+ a margin of error for the weight being further back) and see how she handles.

Look up Butler Marine Products. Scranton Pa. I know , it's and odd place for great teak or glass platforms but IMO they make the best.
I'm 99.9% sure they have all the measurements for your boat on file.

I've gotten two from them over the years, one for my 42' Matthews and one for my Chris - Craft Dory.

Also , I put my 80lb Inflatable on my fore deck to port and tie it down to the hand rail.
I pull it up and over the rail on my own when I take it out.
My O-B mounts on the aft deck mount that I made. It hangs in side the aft rail out of the way. 5 Hp Mercury 4s.

You may not have to mount it on the aft platform. But It's nice to have one, for sure.

Electric davits are expensive, but all you'd need is a hand crank one, and that could prove cheaper than what that swim platform will cost.

Check with Sailorman in Fort Lauderdale, I've seen several used ones there over the years.

I wouldn’t use plywood. Even marine grade can get waterlogged if water gets in. Coosa is the way to go.

Get the @#$ $#$# Butler in teak IMO. Quality stuff and it has a nice rub rail pre-installed. Get four brakets or more if you want and load the Jawn up with what ever you want ! there , I just did it for you. Now you have to pay them ! lol
They are quite easy to install. Please pilot hole ALL of your thru bolts first to make sure you are in the right area you think you are, and want to be. A long 1/8'' bit is good. Check where you came through. If all is good/clear then drill to proper size. Fender washers and backing blocks( starboard etc.) is a good idea , especially if you are going to put the Rib on it. Put some five thousand two hundred on the bolts to for sealant.

Please keep the teak natural, no oils or varnish as the will defeat it's non skid surface, which is it's main purpose. And sealers will wash out in short time from prop/boat wash anyway.

We both have the same transom size even though I'm 42 feet.