"So here is what I would try, the steps have helped me in the past:

Take the APM out of the loop and test each motor and ESC group on their own connected to the receiver and power.  Once you are sure that everything is functioning properly we can…"

"I successfully flew one of my quads indoors using a joystick over mavlink radios.  I didn't notice any issues or latency once I dialed in all of the settings.
I was running it on windows 7."

"I am not 100% sure what type of foam they supply with the PixHawk, but I have had great results with reducing vibration to the flight controllers using this stuff:

http://www.hobbyking.com/hobbyking/store/__15214__Gyro_Flight_Contr..."

"Something like this:

http://www.hobbyking.com/hobbyking/store/__27132__Skywalker_X_8_FPV..."

"I have mostly been printing small items: GPS mast mounts, hex spacers, plastic bushings, boom caps...things like that.  Things that are inexpensive but may cost a lot to order online and I cannot find in local stores or if I need them [relatively]…"

"I went with the Flash Forge 3D Printer Creator:

http://www.ff3dp.com/#!product/prd2/1102918641/creator%2B2-rolls-filaments%2B1-sd-card%2Bfree-shipping

Dual head feed, lots of great features and the price has dropped nearly $200 in the last couple…"

"If you don't already have one, you should grab an adapter like this one to cover all of your battery charging needs:

http://www.hobbyking.com/hobbyking/store/__6697__Charging_harness.html

It should cover most of the adapters that you are looking…"

"Here is where you want to look to see about disabling certain checks, or all for that matter, when booting up the APM:
http://plane.ardupilot.com/wiki/arduplane-parameters/#ARMING__Param..."

"Here is the link to the Grand Canyon site:

http://www.nps.gov/grca/index.htm

I did not see anything for them specifically in the announcements or FAQ about flying there.  It was recently announced that individual parks had an 18 month window to…"

"I have had some basic luck...I am having issues getting the leap to fully control the helicopter.  I am basically having it report itself as a joystick but I am having throttle issues"