Hi! I agree with your idea and just published 2 new files: a A4 with 10 one- sided cards ready to print & cut, and another version with 10 double-sided cards. It was easier this way, latex is... a fickle tool.
I didn't insert the text explanation in the pdf for 2 reasons: what's in the files is ready to print, nothing else needed. Also, the text is already here and in the project page, I think it's enough?
I may create another file called "My 2 cents" or "instructions" if needed but i'm not sure right now.