Here's my attempt to answer your questions with two session under my belt on the Cloud kite and Paipo:
1) Bar: Any bar will work on the kite as long as all line lengths are equal (this is real important) The bridle is designed to work with all kook proof systems. Also the kite powers and depowers with incredibly short throw, so once you've got your bar sheeted for equal line lengths i'd recommend sliding your stopper down a bit. The kite is designed to be ridden with back line tension which takes a bit of getting used to, but once dailed you are set.
2) Travel: These kites are perfect for travel. I'd estimate the 13 to weigh 3.5 lbs when dry, the smaller kites weigh less of course. In fact you could easily pack two or three of these kites into a standard 6m bag plus have room for beer.
3) Inflation system is a screw inflation point similar to Cabrihna
4) Flutter: So these kites are designed to flutter on hard turns, loops etc. Don't worry this is how they are designed and it's fine. In fact I was throwing kite loops in Maui on the 8, once laminar flow is established in the canopy they are rock solid and don't jellyfish or invert even in cold weather. Just note, you should inflate these kites to a solid pressure.
5) Backstall: Much less than other kites because they are so light:
6) Construction: Very good construction along the lines of Cabrihna, solid leading edge and bridle system
7) Bar pressure: Low mid-range. Less than Cabrihna or North kites but more than a Naish Park or Ride i'd say. As I said before the kite is grunty once wind gets in the canopy
7) Paipo board: Awesome! The best of an Alaia and a Surfboard combined. The Paipo is constructed like a snowboard with laminated wood in the core and ABS sidewalls. The board is very light and thus is very, very good for strapless airs. Also because of the rocker and fins you can take it waves too. Probably would prefer the surfboard in big overhead plus waves, but on smaller waves this board rocks because it planes so quickly. Also it's easily to do shuv-its, ride blind, do flat water spins on etc. It's just fun.
Watch here and see: http://www.youtube.com/watch?v=H0JxlIBvpiE