Looks like it’s fixed but not “full” aka no retention on the rear triangle / pedals, still got a rear brake ...
It’s fixed...the chain tensioner just allows the frame to fold.
Do any sort of back pedal / skid and the rear frame is going to fold under...
What modifications did you make to the tensioner?
@Brasslugs started
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Looks like it’s fixed but not “full” aka no retention on the rear triangle / pedals, still got a rear brake ...