To be honest I know nothing about that system. When I installed my Biketronics system which is a 2 channel amp and speakers, I was first urged to flash the infotainment to take care of the sound so it would be more normal, but my results were not very good. That company then had me flash it back to stock and install their BT-355 line leveler which they had just come up with to deal with the Harley EQ issues. Problem solved and I've been running it for around 2 years now if my memory serves me right. Maybe see if the BT-355 LL is right for your situation as it would also allow you to be free of relying on someone to reflash your system. Good luck!
2019 Silver Flux/Black Fuse FLTRU