Marble Sorter for 14mm (9/16") Marbles

Glass marbles aren't entirely consistent, so I designed this marble track that sorts standard 9/16" marbles by .5mm diameter increments. Made to help me assemble my Astrolabicon puzzle, but use it for whatever means you require!

Let marbles roll from left to right and they will fall through to sort themselves. You may need to slightly raise the left side to get the marbles rolling on their own.