You don’t have to rewire the motors just remap them. Use Mission Planners Motor Test feature and then adjust the servo mapping to correct it. You may have to change the motor direction also the test is good for this too.
First make sure the board orientation is correct by pitching and rolling the craft while looking at the HUD in Mission Planner. If this is wrong correct it with the board orientation parameter.
I currently have the quad back on INAV to investigate an unrelated problem, but I took out the sd card and the APM/LOGS folder is completely empty. APM still contains ArduCopter.bak, so I don’t think INAV has killed any logs that were previously there. I should probably take a look at LOG_BITMASK next time I have AC on it?
Note that I haven’t really started the basic setup, for now I was merely just trying to find out what I’d have to change physically to be able to move back and forth between INAV and AC just by changing the software.