G'day suebutcher
That was a great mid-arch design.
I would like to point out something about chassis design for rotaries...

The best designs had front strengthening to avoid base cracking.
I have seen too many bases cracked due to front impacts.
The bumper over-riders (auto style) did a good job on your base.

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A parts manual would be very useful, thanks! I'm sold on the old-time Supaswifts, but I've never found one without mods or bits missing. It's frustrating.
I finally found time for this project ...
https://www.outdoorking-forum.com.au/forum/u...swift-parts-manual-c1970s.html#Post95796

Cheers
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Jack