@Chris - thanks for pointing me there, will have a read and research.
@Will - thanks for the offer of a pdf. I don't have a pdf (I've got jpg and png ones) but it sounds like the same drawing - would be interested to have it even so, so i'll PM you.
- the mast ideas sound interesting, however, it's a bit busy just there (the slot for the windscreen is there) but maybe i can make it work.
@Ian - Sadly not, it's the plan of the actual boat so all that would have to be worked out (fudged in my case!). The drive train will be awkward to fit in never mind the rc stuff, it may never come to anything, who knows. I (think) I've done it as 1:8 but may need to go bigger. Someone has done an ic engine version in aluminum at 1:4 but no RC.
Cheers Mark