Thanks for the tip! I will definitely be trying this out next time. PETG eats the cheap HD glass. I usually buy the 12x36" glass and cut it myself. Looks to be about the same price locally (12x36 is $6, and the 6 pack of the mirror tile is $11 something), and I won't have to cut it.

Is the mirror tile reversible? I usually turn over the glass before tossing it when it starts to get divots on one side.