Hi Don,
I ordered an inline thermostat from www.highwingllc.com ,as well as an oil cooler shutter. I am going to give that a try. I also have looked at the thermo-bob , I think on my installation the cockpit heater radiator circuit will be my "bypass" most of the time. especially in winter.

I also would like to hear from others that have installed an inline thermostat on a 912.