Here is a good topic to explain how to do this. The crumb tray is 1.361" by my measurements. There is a .433 room for focusing above the crumb tray that you can enter into for material thickness. The actual clearance from the crumb tray to the bottom of the air scoop for the air assist is about .5" or slightly more. I can’t give you a real world answer because I have never placed anything exactly 2" in to try and process it, nor have I tried anodized aluminum (although others have done so successfully.). By my calculations, the engraving might be out of focus a bit if it does fit under the head without getting whacked by the air scoop.
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