All correct.
Apparently 3 were built in all, using a fiberglass body made by Bill Devin, whose product was both lightweight and functional.
competing against the likes of Lister-Jaguars, Ferrari Monzas etc and Maserati 450S's and D-Type Jaguars the Echidnas started 35 races in two seasons, 8 of which they won overall with 17 class wins.