Short guide how to fit Adafruit BNO085 to KaupoiMOD PCB v3.
Cut SCL and SDA traces under the board between BNO055 slot and Nano.
Cut SCL and SDA traces on top of the board between BNO055 slot and ADS1115.
Drill BNO055 slot 2 mounting holes closest to Nano bigger. 3,5mm should be big enough.
Drill Adafruit BNO085 2 mounting holes bigger. 3mm should be big enough.
Solder jumper wires at pins SDA and SCL between Nano, BNO slot and ADS1115. SDA and SCL needs to be crossed at BNO055 slot. See Adafruit BNO085 pinout. Be extra careful!
Remove MMA if installed. Place Adafruit BNO085 to BNO055 slot. You can use M3x11 standoffs.
If you did it carefully enough, you should now have a working BNO085 on KaupoiMOD pcb v3 that can be used with AOG v5.