Completed model pictures
180mm beam x 820mm long x180mm deep
480 motor running on 6 volts
Figures are from good old Ebay (China before the virus) primed and all repainted by hand over 100 😀

Thanks for all your comments, I used the plans and instructions but they are not great, if you want to buy the kit it is :-
Penart Venician passenger Motorboat
(Vaporetto Veniziano)
From a lot of suppliers at around £260 for the kit not including motor, servo and figures