Thanks Scott. My question is rhetorical, mostly.
My point goes to the mention of WM 2000 Series earlier in the thread. That is, WM 2000 Series doesn't satisfy 2008 NEC 406.11.
The other point goes to aesthetics and the expectations of the designer, decorator, owner, GC, etc., who "knows" what a good install should "look" like.
The person paying for this aesthetic is buying the absense of any electrical hardware in plain sight.
The Tech Lighting rail is enormous, and, to be out of sight, requires custom valences, and most "designers" I know will say the look of the resulting cabinets is wrong.
The WM 24R Series is definitely better, at 7/8" thick, but the width of ~2" makes it hard to mount to the back splash and hide without a super wide valence, . . . and when mounted to the bottom of the upper, the end feed sticks down ~ 2". Same problem.
Either the customer has to be told to change their idea of what looks good, or I have to find a better material solution. Remember, this is a customer paying more. . . paying for the "look" that is promised by the 1" thin luminaires.
What other TR plugmold solutions are there?