BTW, I first heard the story in the late 1980s? My recollection was that
it was in a sidebar in a magazine article. I can't currently find that.
Massaro's denial of it
http://archive.computerhistory.org/resources/text/Oral_History/5.25_3.5_Floppy_Drive/5.25_and_3.5_Floppy_Panel.oral_history.2005.102657925.pdf
was 2006?
The story was about the diskette size.
Massaro's story is about the size of the DRIVE, and making a cardboard
mockup in the backseat of a car.
Unless Adkisson comes forward, and reasserts the validity of the story,
then it is unlikely.
