Since I went with the Superior XP-360 and the Grand Rapids EIS 4000 I learned that the way the head was cast and machined

that when the adapter for the CHT was screwed in place, the sensor then can not be turned and locked into place.

I ordered some Copper washers from McMaster Carr Part Number: 94397A641 to use as spacers.  These washers were

3/8" ID and 5/8" OD.  I machined them down to .540 OD in order to fit the recessed area in the head.

As you can see it raises the adapter just slightly above the head surface.

Since there is no good way to access these adapters for tightening with a large bladed screwdriver, I modded this socket in order to tighten

the adapters using a 1/4" drive ratchet.  The adapters are a soft yet brittle cast material and easily break.  This tool worked perfectly in

tightening them snug without damage.

As you can see there is no extra space between the washer and the lug on the adapter while turning it into the locked position. 

I drilled my EGT probe holes 2" from the flange on all cylinders.  I also drilled them so that the hole was on the flat side of the pipe so the

clamp/probe would seal nicely.  I also was able to angle each of them for maximum clearance between the Cowl and pipes and so the wires

would point rearward for easy management.