MultiWii

Hi all love the useful info in the forum, here is a video I made with the go pro of my first test flight, have a cheap f450 clone from HJ has the built in MWC 2012 2.1 firmware, no markings at all on board and I burnt out a chip on GPS board, i2c board is still good should it be connected anyway?

1 Question I have is I have some vibration when I back the power off, what pid settings should I look at tuning. Kinda of noob any info would be great.

Video
http://www.youtube.com/watch?v=tFwlxsl02L4

Thanks