I had the same problem after 750 build install. Did compass calibration and in the middle of that the landing gear went up. Couldn't get it back down. So I tried starting the motors with the blades off. It resets the landing gear.
I have Samsung 128 Gb class 10 U3. I have formatted in fat32 and my H+ will not see the card. My computer see's it just fine. It sucks cause I have two of them. Guess I have to spend more money :(
Yes on the Europe Yuneec website you can read on the C23 camera that will be compatible with the typhoon H / pro versions. Also it might be around $1100.00 US. I can't wait!!!