A few considerations for you. Many of us have seen about a 5 degree drop in standard temperatures by changing over to Final Charge. (I have.)
The current fan control module has three speeds of low/medium/and blast off high
! Check out the Source Engineering Wax Valve solution.
I was beginning to have intermittent problems with our fan controller which of course defaulted to blast off high speed. I was always able to get it to start working again by cleaning the harness plugs with electronic cleaner, and a small application of electric grease helped too. But, I felt it was on it's way out. And knew of many coach owners that were on their 3rd unit replacement, so did not want to get into that cycle.
The Source Engineering advantages are:
-Infinitely variable speed of fan based upon current temperatures.
-KISS also equates into less things that can go wrong
-I expect this to be a one time repair, and costs were close to a new Fan Control Module
I really liked the infinitely variable speed fan, as that meant the fan was only consuming/diverting as much HP form the engine as needed to keep things cool. This meant that more HP was available for the drive wheels.
Check out the Thermal Conversion Kit
Source Engineering Inc | Custom RV Chassis | Eugene, OR
Many CC owners have had good luck with this, as well SOB's too
Best of luck to you,