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.

hi
we are at a stand still waiting for the esc to come from canada ,i am useing a grauper 900 tourge motor and a 4 blade prop , i should finish building the upper houses but it summer time now got lazys so i guess ill get back to it some time we are going to put a fire moniter on it as soon as i fugure out how to turn it on and off by a servo ,i try a switch on channel 3 but the servo really busses bad thanks rye

A 12 vdc car winshield washer pump can do a great job for the monitor . A big GM car from a junkyard will get you pump, hoses, and a connector with some extra leads length.

hi thats what i am using on a button swith that a servo turn on and off just cant get the servo to stop bussing when off need to find a better way of turning it on and off from the radio rye

Take a round servo wheel an file a ramp & notch for the button, to be either on or off.

Leave a little space between the servo and the button.
Servos usually only buzz, or humm if there is something preventing
the servo arm from reaching its full throw, or center.

[8D]

thanks rye