Author R.M. Mottola wrote this addendum to his article about making flattop guitar prototypes:
“In my article entitled A Method for Generating Rapid Prototypes of the Flattop Guitar and in the accompanying sidebar entitled Using High Pressure Laminates in Lutherie appearing in American Lutherie #88 (Winter 2006) I failed to mention that use of high pressure laminates in the construction of acoustic guitars is covered by United States patent #5,406,874, held by Jim Witchel, and that exclusive rights to the use of this patent have been granted to C.F. Martin & Company. I regret the omission and thank Mr. Witchel's agent for pointing this out to me.”

R.M. also wrote to update us on the project:
“The prototyping effort featured in the article was performed in an attempt to design an acoustic bass guitar with a tone more like that of the double bass than is typical of ABGs. Since the characteristic sound of the double bass is in large part due to a high degree of damping of the upper harmonics and since orchestral bass strings have a large amount of internal damping, most of the prototyping work involved fitting 1/4 size orchestral bass strings to an ABG. This required a different string anchoring mechanism to anchor the long strings, which in turn required a new bridge, which in turn required changes to the bracing of the top. The instrument that ultimately resulted from that experimentation is shown in the accompanying photos.”