Pete,
by the way, I remember building a Mach None 'round the mid 80's. I built it from an Ace kit and covered the plastic canopy and foam wings with Ekonokote - straight [:-] (orange if I remember correctly). I was planning to put my pressurized TD 0.49 in it but unfortunately left the country shortly thereafter and the plane never saw flight [

].
I'll have to check with my dad to see if it still exists somewhere.
Nice little version of the Mach 1!
David.