Printed with BBL Blue Grey PETG on an X1C using a 0.20 mm profile and 0.4mm nozzle. Aside from the filament profile that I calibrated, rest of settings were same as @PrestonB 's. It Came out great! I added padding to the top part that rests on table to help prevent slipping. I wish I had thinner foam. Suggestion to make a model that adds a few extra mm of height so it still folds up even with added foam.
Pictures including one holding up a lap desk. Seems sturdy. Thanks for designing this!