RE: Formula vs. Apollo vs. FX five
you're right, we don't do any strong wind formula races in Germany. In 2006 we have had Formula as light wind racing from 7 - 15 knots with one board and one sail. From 11 - 30 knots we had slalom with one board and three sails.
So at least we have had 2 boards and 4 sails for all racing conditions. Plus all the wave- and freestylestuff, because we do all the disziplines in one event.
The years before we have had one board and two sails for both slalom and formula. Windlimit was 7 - 20 knots for Formula. But for 2006 the focus was more on slalom, so we stopped formula at 15 knots. There was no changes in the number of participants.