An observation, which might prevent others being caught out.
For our recent Falmouth Classics Regatta, all the participants were issued with number boards. Lots of them didn't have sail numbers (well, they don't race except maybe once a year, so why bother?), and I decided to treat the number boards as an Alternate Sail Number, so that Sail num Wizard could pick that up. Sadly that doesn't work. The absence of Sail Numbers means that the 'alternative' isn't seen. Of course I hadn't tested it beforehand so we had the joy of clicking on each cell individually and entering the times.
Lessons to be learned: don't second guess Sailwave; test it before you go on the water (and well before you have loaded all the participants).
I'll think about using the Board number as a Bow number next time. And I'll test it!
And yes, we all had a wonderful regatta.