I've been running the Nacra 6.0NE chute (380-400? sq ft) without any issues. It's too big and full compared to the new Nacra 20 chutes, but it was cheap
Doesn't reach as high or as fast as the Nacra 20s, but seems just as fast going at normal deeper angles. Probably needs double-trap crew more often, too. Don't know if that's a bad thing
Just have a simple mast tang riveted on the comptip for the halyard. I have yet to even notice the comptip bending off to the extent I've seen on the Nacras (but then again, when it's blowing, I'm usually too occupied to look up at the mast tip).
When the chute goes up, I pick up the traveler and throw the main sheet on the tramp; that way I can't let the main sheet out by accident. Flipped over several times with this but have yet to pitchpole.