i might interject an observation which may, or may not, be pertinent to the issue.
when some modelers describe their builds, and i know who you are because i read the threads, i quite often see "i channeled the coupe 1/4"" or "the top has been chopped .160".
so if everything is being thought of in scale, why wasn't there a 3" channel or 4" chop?
there is near perfection demanded from the manufacturers, but we're not holding up our end of the deal.
i find the inconsistancy quite annoying.