I've been toying with the idea of widening my NACRA 5.8. It seems that the bow shape is pretty resistant to pitch-pole (lots of volume and narrow on the top), and that with some extra righting moment it could handle a fair bit more horsepower. Any thoughts on the NACRA 5.8 design in this regard?

I noticed that Performance Catamarans sells 11' cross-bars for converting a NACRA 5.5 to an 18sq. It seems like they would go on a 5.8 pretty easily. Has anybody else tried this?