Hi matey
Lots of useful points there...
The decision is now to make a solid boat with no breaks. The issue re trailors is one that has vexed me but seems to be resolving itself into a choice between a glider trailer, an advertising trailer and a scratch built, twin axle trailer (made for the job). I've decided to put this on the back burner for the time being. Regarding vessel regulations, she will be equipped with fire suppresion,bouyancy aids, horns, lights, ship to shore and guns! (Lots of pirates in Bristol don'tch' know?). I will be registering her as a 'proper' boat in Bristol with full, inland waterway licence and number. Auxillary engines may be a moot point as, at this moment, the design calls for ALL four props to be independantly powered.