Yes, I 'd ave stuck with the original diesel, but perhpas it was dead.
Inland waters? Why, Clarkson crossed the Channel in his. I wouldn't want to be out in rough water, but otherwise, why stress?
I do wonder why they are selling it tho, they have put a lot of effort & money into what they have already done & won't get anything like their money back. I suspect they may have realised some of the errors they have made & either want to start afresh, or cut their losses. I think 500squid is already overpriced.