Hi Rob,

Your link doesn't seem to work, at least on this end...

With a loa of 853mm you'll need to build rather light, if I remember correctly, the cloth for surfboards is rather thick, most likely too heavy for a relative small yacht.

As it's a powerboat, the lightest option is to go semi scale and only use one motor, givine you the benefit of less weight and the use of a single bigger prop, which is more efficient than two smaller ones (= more speed and runtime).

Basically the motor(s), batteries and ESC(s) are the only items you'll need to buy, all the other hardware can be homebuilt.

Read up on the scale forum on yacht builds, use the search function, you'll find most of your questions have been answered more than once.
If you don't find the answers let us know.

Like Toes said; 'What do you need to know?'

Regards, Jan.