The oak battens, chine and keel that I was going to glue the aft bottom panel to were all tarnished from just being open to the air. It took most of the first evening and 3 belts (40 grit) on my belt sander to remove all the tarnish and leave nice clean wood to glue up. New belts are cheaper than the added time it takes when you persist in using a dead one, and dead ones burnish a surface. That's not good for gluing.
I'd gotten an attachment to allow me to connect my bosch sander to a vac, so there practically no mess.
I clamped a few guide blocks in place, and put in a few locating screws. This allowed me to consistently replace the panel. Then I marked up the places for all the screws, it takes long enough that you don't want to be doing that while the glue is setting up.
The next evening I coated the oak in neat epoxy and then pasted on micro fibre mix. A little careful lifting and the bottom panel was in place.
There's ¾" screws every 3 inches on the chine and keel and every 6 inches on the 3 battens. Add in the screws on the transom and you suddenly have about 100 screws. Two 18 volt drill/drivers means that you don't have to keep swapping drill bit/driver bit.
When I get home I'll see how well it all went.
Even so it was well dark by the time I finished, my builders site lamp is getting a good workout these evening.
More sanding this evening to start the aft panel on the other side.