We received our first 100 Tact-Tiles yesterday. These were produced to test inks, fit, flatness, etc. They had a few minor issues, but nothing that can't be fixed relatively easily. And I was able to test the marker adhesion, which proved to stick to the tiles as we'd hoped, and easily wipe away clean.
We dropped several off with our silk-screener, who will hopefully (fingers crossed!) be testing the ink today.
Our hope is to have a few sets of "finished" Tact-Tiles to endurance test over the weekend. We're going to be making sure the plastic doesn't scratch too easily and that the ink doesn't chip off or easily scratch away.