Thought I would post this as chit-chat since it's not a mini , its not a 'variant' project and it might be of interest.
Basically a mini sub-frame and engine with a jet-ski style seat. Produced as a kit in the 70s.
I think the face of the bloke on the left says it all!
Interesting write-up here -
Stimson Scorcher 3-wheeler | Small Cars Club