what if--- instead of flaps on that Kadet -- you simply used an in flight adjustable stabilizer and kept adding AOA to it and changing power to hold altitude?
OR shove CG back to say 40% of MAC
all rather pointless except that I bet the setup which sets entire wing (or as some call it "the main(?) wing") at a higher AOA will fly slower yet.
I don't hate flaps - just musing---
My own Seniorita Kadet is soooo much fun to really slow fly - I setup the elevator for lots of throw - it has a screamin K&B Sportster 20 on it running a 12x4 prop and sounds like a muffled electric -
I can literally run alongside it in a gentle breeze.