"Sam, if I may ask: what happened to this project of yours? It seems to have great potential going forward in various ways. Andrew Tridgell just posted a nice video entitled Small quad circling fast in Vicon. I've been curious about this topic for…"

"[SOLVED] After putting a new GPS UBlox on top, the tricopter held its location just fine. I threw away the old, non-working GPS."

"Andi,
You can calibrate all the ESCs to begin spinning the motors at the same time using the details on the following link: http://copter.ardupilot.com/wiki/esc-calibration/
If you perform the ALL AT ONCE calibration of the ESCs and find that the…"

"Even though I performed a Compass/Mot calibration (successfully), I thought that perhaps there might still be an EMI issue with the motors and ESCs. 
So, I installed a capacitor onto one of the spare outputs of the APM. Now, I have a working quad.…"

"After reading http://copter.ardupilot.com/wiki/common-appendix/troubleshooting/ I changed the propellers from 1045 to 0645 and the quad flies well. It had way too much thrust with the motors. I initially thought they were 1000KV, but they were…"

"I'm interested in you patching the USB port. Can we discuss?"

"Maury,
I attempted to solder the USB port onto the board, but don't have the eyes to see those little pads nor the tool for the accuracy required to solder it to the board. So, I'll settle with use of telemetry and the older version of the FW.…"

"Maury, after seeing a few people solder these small USB ports onto other circuits, namely smartphones, I am ready to attempt soldering the port back onto the board. I'll do that this weekend. Since I am running an older FW on the 2.5, I will be…"

"Maury, your analysis was absolutely correct regarding the onboard ACC. I did not even check this assuming nothing had changed. With telemetry transceiver in place and connected to MP, the horizon was not level on MP when the copter was level. After…"

"Maury, the contacts on the USB port are simply too small for me to try to re-solder. The board is fine otherwise - there was no physical damage to the board. Since I had a pigtail permanently connected to the micro USB port, it was yanked off the…"

"Andre, I swapped the ESC and "lazy" motor with a pair that I know is working. The same lazy startup occurred after arming the copter. However, the calibration worked fine and all motors start up at the same time. I then, swapped the control leads…"

"I do have an inductance meter. I will test that first. Calibration send to work fine and ask other aspects of the APM seem to appear normal. Thank you."