I have the answer
BBC,
My P42 is six years older than yours, and I have had the same problem. Repeatedly. Many times. Some of the screw holes get stripped and I enlarged the screws as well. Also tried 4200 and 5200. The teak strips have bowed, which exacerbates the problem. My last fix, a little over a year ago, was to use a tube of Liquid Nails as the bedding compound. So far it's working great, and has easily outperformed the 5200 for adhesive quality up there. It surprises me, since I would have expected 5200 to perform better in what is almost an underwater environment up there, but there it is. Good luck.
You can get these wonderful things called "barbserts"
Basically what consist of are brass ferrules that have a coarse wood cutting thread on the outer perimeter, and a machine screw thread on the inner diameter.
So, you drill the reccomended size into the teak, screw in the insert, and then have a perfect machine screw thread that you can install & remove the strips from now to eternity.
These barbserts are available in brass, stainless, and (don't get these), regular carbon steel.
My recommendation is to go with an internal thread of 10-24, as that screw will fit perfectly with the previously stripped out wood.
I then reccomended using these as well into the starboard, so that you can removed the starboard seats from the railing, and replace as many times as you wish.
Once you start to use barbserts on your boat, you'll find a million uses for them.
Be sure to get the type that screw in, and not press in. The press in types are designed for thermoplastic assemblies, and aren't suitable for wood.
You are going to be thrilled with this solutuon