Using a beaded chain as you coupler might help remove CC interference.
it does not need an electric fan. the fan it has roars like a Freight Train when the thermo-coupler engages it... and the air coming out behind it is very strong.
Twice, I got it too hot, gauge up almost at the Red Line.
Once I left it idling too long keeping the dogs cool: raised idle speed to 1500 and the fan started roaring and the temp gauge dropped in about 1 minute, in about 3 minutes it was down to normal again.
2nd time, I got to pushing it too hard, pushing 68 mph instead of 55 mph, against a headwind. Temp redlined and when I saw it, turned off the a/c and dropped the speed back to 50 mph.... in 2 minutes flat the gauge was back to normal.
Chain Beads: Now that is a Damn Good idea!
as for the idle speed, I can slowly press on the throttle and the RPMs will follow very good.
I can hold 1500 RPM constantly and it does not try to hunt.
have a lot of confidence the vernier cable is just the thing I need.
and that beaded chain? problem solved.