Allen printed it
Each week Allen prints a model or two from the list and grades it on print time, filament, difficulty, and whether it actually works. Graded models get a green "Allen" tag.
How grades work
A Worked first try and looks great · B Works, with a few tweaks · C Fiddly, so only print it if you love it · D/F Skip it.
Difficulty runs from ★ (print and go) to ★★★★★ (supports, sanding, glue).
Difficulty runs from ★ (print and go) to ★★★★★ (supports, sanding, glue).