Tom,
Please don't misunderstand me. I am new to this forum and I am certainly not questioning the measurements Edward posted. In fact, if you have viewed the PDF file I posted, all measurments were based on the information that Edward and Formica provided. Their measurements laid out in CAD without any conflicting placement.
What I am looking for is more detail on placement of the mid and high frequency horns with drill sizes and opening locations on the upper baffle as well as the attachment of the upper baffle/grille assembly to the upper cavity. Also, most products that have enjoyed long production runs such as the Belle's probably have had several upgrades or component changes. Stuff like that.
I agree wood is a somewhat forgiving material and extreme accuracy is not always required however, when (if) there is accumulated tolerance errors the end product may not turn out as expected.
Please forgive, if I have offended anyone. I am at times a bit of a perfectionist and forget that we are not living in a perfect world.