As Rolf said, I would call the 1.04 class a thread.

If you ask which class has bigger growth possibilities towards the future, I'll say the F16.

The reasons are the ones that have been talked about already some times and all come down to the fact that the F16 is a formula class, meaning all boats have equal changes in different conditions. The C104 is nothing but a group of boats having the same rating meaning 16 and 18 feet cats are in, .....

The C104 also claims to be a big class (because they unite a number of existing models), but if you take Carnac for example, the spits raced in a seperate group, bringing the number of C104 down to aproximtely 10 cats racing in C1.
2 remarks:
- why don't the spits race together with them in a separate 104 course?
- there were 5 F16 at Carnac. With no F16 currently in France and manufacturers that can't be compared to Hobie or Nacra concerning quantities sold I think the F16 proves it's spirit.

Gill