My Revmaster manual has a clean and accurate solution. Drill two perpendicular holes in the boss for the cylinder head nut closest to the exhaust valve. One of the holes should be just large enough to accept the wire from the thermocouple after you remove the ring. The second hole is tapped for a small set screw to secure the wire. At this location, Revmaster recommends temps of 350-375 for cruise and a climb limit of 450. Once installed, you won't have to bother it unless you remove your cylinder head or the entire engine. You can change plugs and torque heads without fear.