RCS 1.40 electronic ignition. Throttle and choke servos mounted in cowl next to the ignition and engine. Zero RF. 6 years later, different plane, same engine and ignition. Throttle servo mounted 18 inches away. Got hammered by RF. Switched to PCM and no RF. You need to test things to see if they will or will not work. I have gotten lucky with different set ups in different planes, done everything you should not do and it worked, don't everything you should do and gotten bitten. If it doesn't work the way I have it I try something different. You do need to test 2.4 but it is a lot more forgiving the 72.