Great info in this thread, and skjos I am jealous of your 3 guns! You've certainly got me thinking about at least one more...
I recently received my 4006TSW CHP and completely broke it down for a much needed cleaning. Looks like I'll have to replace my recoil guide rod, but everything else was good to go. Some interesting features I noticed though:
-The drawbar assembly doesn't even have a hole for a trigger play spring.
-Steel mainspring plunger and disconnector used.
-The decock-only safety body is unique, in that it does not have a hole for or use a ambi safety body plunger&spring. Instead, the body has an indent on the far side that a built-in plunger clicks into, and the plunger comes from under the rear sight and into the safety body channel (see pics). Mine has the correct .45 safety lever with the tab.