I have an old magazine, Flight probably, that mentions this aircraft in glowing terms, and Jim Bede as a messiah! But the following sentences from the linked wiki should give one pause:
"The aircraft was fairly conventional in construction terms, using aluminum sheeting"
"dry weight was only 725 kg, about the same as light aircraft like the Cessna 172"
"at full power would reach Mach 1.4"
"Five examples were built in total, three crashed. Only two examples remain, both unflyable."
This gave me a smile this morning, thanks. It hardly needs be stated that designing any aircraft is a tough job, let alone a supersonic one designed to be built in a backyard shed, and I'm more than a little glad I don't have to worry about having one disintegrate over my like one of the prototypes.