Fabricated a mount today for the Defi BF Meters.
I decided to mount them securely on a slab of aluminium to match the gauge surround. I plan to attach this to the central speaker groll in some way probably by making a new cover utilising the existing frame.
I am utilising the standard Defi Mounting hardware with the tape plates trimmed and drilled.
Mounted up they look good and test fit and operation is good.
Just need to run the wiring and make the speaker mount.