I've found stange problem, i try to explain it.
I've octo drone, i download V2.0.54 from the download area, change in config ONLY the frame type (OCTA_FRAME), then upload to the board with Arduino.
When i connect in APM i see stranger altitude variation (from 0 to over 300 meters), ciclic, impossible to fly in ALT_HOLD/LOITER, etc.
See my tlog in attachment.
If i compile the "original" configuration the altitude is ok, but i can't fly octo with quad config (LOL).
With 2.0.49 and the old version i've zero problem with code personalization.
Dunno if this is a bug or just a problem with my OilPAN/APM, but i don't think.
Please Team check this problem, thanks a lot!