Agreed the issue is if the canbus over engineered electrics will cope. The wires arrived today but not the buzzer.
Last Wed one of the Great Escape Gang did a few miles on an A road indicating left. I then followed suit on a B road. Safety first me thinks.
Guilty as charged

John when you connect up buzzer to each indicator circuit you will need two suitably rated forward biased diodes to stop the two circuits paralleling. Apologies if you are already aware.