Well the maiden voyage didn't go too well. Got it started, got a rich tune on it and threw it out onto the lake. Went off like a scalded cat for about 40ft then stopped.
Ran it a couple of times on the bench, it sounded as if it was chugging due to the glowplug being on the way out - which it shouldn't have been as it was brand new. Ran it once more and pop, that was the end of that. The big end of the rod has failed around the oil port, sending a small shard upwards into the bottom of the piston skirt and another into the intake drum, which locked it up. The piston is salvageable, the drum will buff out and everything else is undamaged, though new rods are impossible to come by as production stopped on these engines years ago.
C'est la vie, these things happen when you buy second hand motors. I've ordered a brand new CMB45 V5 to take it's place, so when I've got that we'll have maiden voyage part 2