Jack, I was in no way inferring that someone was right and someone was wrong about anything in my post, please accept my apologies if it appeared that way.
G'day
wce and
MaxIt's all good
wce. Both Max and myself share the same view about research
and presenting facts, and having friendly argument. That is a great USA
image of their version you showed us!
Max's hard-drive memory always boots up to an impressive specification,
and I do not ever remember it failing. - its digital, after all

The important thing here is the finding of
swing-back blades in a
1941 patent.
Goodall is recognised as an early maker of USA rotaries, but I had never seen
a bar holder and swing-back blades on a Goodall.
It is an exciting find in piecing together the history of swing-back blades.
I'm sure we are getting closer to understanding the AUS Fastcuts, too.
I can't say I understand why Sunbeam spent design effort on the AUS
off-set design, given the rejection of that experiment here in the late 1950s.
In any case, Sunbeam's purchase of Victa in 1970 must have been
instrumental in the demise of the Fastcuts. Victa were already making
fantastic side-discharge, catchered, utilities by 1968 [Special 2].
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/77945/brochure-1968-69-range.html#Post77945Cheers-----------------------
Jack