This is so awesome, and I too have these little looms saved somewhere as a future project (Etsy, Pinterest, … 
) I would love to know if/when you decide to sell your file design, as I’d jump on it, since it would save on me having do the design work myself 
Speaking of random weird gadgets, have you seen razor blade sharpeners that flip themselves? https://youtu.be/YxSqQ8_YsCc?t=250 I’d almost brave COVID to search for one of those doohickeys in the antique markets down here!