Thanks guys.
Although the sound of building a kit boat is appealing, I am on my way to building this from scratch!
I have marked out the sides for the "standard" 18 X 8 Springer for my daughter. I have in my box of bits a motor with gearbox and just about everything else... I think???
Really, my question was... If I was to scale it up 50%, What should I aim for as far as drives, motors and so on...
I was thinking, twin 50ish mm Korts, direct drive 540/600 motors running for 2 12V 7A batteries...??? Maybe????