LOL, Pug! I love your technique choice for April!
I agree with Heidi that choosing image(s) may take some real thot. And... Using the technique as given on the (great) link, also means that players
may have to do some work so the final ATC is the 'right' size & the image(s) suitabley separated into tiles.
'Course there are other methods for tackling 'faux tile', but it's gonna be fun seeing how players/swappers deal with what's needed.
Not sure yet if I can join, but definitely considering it, LeighAnn.