I guess it boils down to the intent of the rule...My perception is that it was designed to prohibit L-shaped foils and was really an attempt to keep the boats from full on foiling. The guys have figured out how to start tinkering with the foiling thing anyway in spite of the rule...but it's still not easy. At the time, I thought it was a creative way to make a simple rule to limit those foils. However, in hindsight, it might have been smarter to define the limits of the foil in geometric terms.

I can see that a fully foiling A-class, class, is probably in our near future.