I had an RM250B I bought off Phil Thew, Noel Harkers old bike....only 6 months old, and I loaned it to Stew for one of these events...not too sure which one though. Too long ago to remeber if he was in open class by then...pretty sure he was c grade.
I can't even remember racing in the sidecars...must have bumped my haed too many times since then
but I do remember racing against those guys in '77 at ACUSA park and then again in '78 at Broadford.