There wasn't really any doubt in my mind about it floating and not leaking but it was good to see it float away from the trailer to the limit of its painter before I pulled it back in. First time out I rowed too far and ended up with some very sore muscles (but not where I expected to be sore). The next couple of outings I didn't overdo it and am gradually improving the hardware involved in rowing. A footrest (to brace the feet/legs against) appears to be important. The balance of the oars is important (there is now 800 grams of lead sheet wrapped around the inboard end of the oar). Last on the list of improvements is my technique which is gradually improving (it's important to rest between strokes).
Third time out I managed to arrange a camera person and have some pics:
And, finally, a short video: