I decided to opt for an alternative mounting location for my Silent Hektik voltage regulator. My RV-12 has the old style cowling with the ducting going to the coolant regulator mounted on the firewall.
Taking a page from Jean-Pierre's (WingedFrog) playbook where he mounted his voltage regulator inside the air duct in the lower cowling in front of the coolant radiator .... and blending that idea with John Bender's (JBPILOT) "Bender baffle", I mounted my regulator inside the air duct and on the baffle plate.
The install now has 50 hours on it and I'm guessing Jean-Pierre and I probably have the coolest running regulators in the RV-12 fleet.
Below are a couple of photos of the SH regulator mounted on the "Bender baffle". To accommodate the mass of the regulator, I used bushings and large washers above and below the baffle to insure a tight fit on all axis and installed hard stops to establish full closed and full open limits. Wiring goes to a screw down terminal strip mounted on the firewall shelf. The old Ducati regulator was left on the firewall shelf as a backup (which I will likely never need).