Hi Rye

I have the Amsterdam also. I wound up putting in a big Pittman motor @ 2.5# & a battery 9.2 #.

I put a large Octura prop on, 2.8" x 5" pitch, to get some prop wash to come up to deck height when towing full sized rowboats.
I did NOT glue any of the decks in place because it is not necessary. It really makes running the boat so much easier.
Warning!!
Wash the plastic hull insides to remove the molding oil? wax? so the stuff will PERMANANTLY stay put.

Edit
She is the grey boat in the bottom left of the photo.