"Just got one of these myself, it survived a couple hard crashes the first couple minutes of flying (sure drops like a rock if you back off the throttle too fast) but after that I had no trouble flying it at all.  Considering I've never even flown an…"

"I believe this design differs a tad from Gress' design as this one has a 45 degree angle for the tilt as opposed to the Gress 90 degree angle. Balances the gyroscopic effects while still allowing for propulsion from the rotors being tilted?"

"Can never remember my paypal password but after I get home you will have another preorder :)"

"Just wondering, could the vortex be overcome by rotating the quad slightly during rapid descents?"

"Yeah, I've been thinking of something along those lines myself as it would be some fun stuff to program the conversion from vertical to horizontal flight. Was thinking more of a large central lifting propeller with two thrusters that rotate 90…"

"I figured this wasn't really a for profit enterprise so not much wiggle room. If robotics do catch on at my college we can discuss larger quantites later though the engineering department here isn't huge so the quantitys would probably be too low.…"

"Will there be any discount on the ArduCopter for educational organizations? While the prices being tossed around are pretty good already, (and I plan on buying a regular priced one for myelf) I'm looking to see if I can get my local college started…"

"I'm not sure how this would translate to a quad copter but I worked on a rate table project that used servo motors (college project which never got completed 100%). We found that we needed fairly low PID values while the table was accelerating as it…"

"When the ArduCopter is available, it will be added to the DIY store or should we look to the site that sold your prototypes?"

"You might find this interesting as to pitch control of a tilt copter: http://baronshobbies.com/2009/08/gress-aero-bi-rotor-vtol-aircraft-..."

"I own this book myself, also recommend it."