Yes, I have buildt one before I started to sail the Tornado. The Quattro 16 is a handful in severe weather. The front beam has issues with punching trough waves. Otherwise it is much like the Hobie 16.
Dont know about the 14 tough..

If you want to sail something in hard weather, get an old and cheap boat and sail it to smithereens instead. You dont want to wreck something you just spent lots of money and time to build yourself.

Check http://www.multihullboatbuilder.com for pictures of my Quattro 16 during building.

It now lies at rest in storage..