In my opiniion the FX is built pretty tuff. Alot of the parts are the same as on my Tiger. Cross beams, rudders, daggers, and most of the rigging.
It may even be abit over done. But I am happy with the durrability.
As far as running in the chop, it goes quite well. We did a distance race on the Columbia River that was about 25 miles, and the waves can stack up there.
Durring this race i was impressed with the performance.
I hope to race more with the Tiger fleet this year to see how it does.
You will love this boat. Good luck.
Wind in your sails, water in your shoes, great day!