I will give this a shot! To be honest I am finding the compass challenging to understand.
My first thought is that the weight gain without eating more than before is an old brain issue possibly to do with protection and safety and/or not wanting to let something go. I also think that this is a long term condition if they are obese. If it is an old brain issue then it would have to be a plus function unless it has gone on for a very long time. (does the plus or minus function change after a long period of time?)
Could it be connected to the BS and CB?
I seem to have more questions than answers:)