- The trays print with almost no support structure, except for the handles.
- They are stackable
- It was designed with PLA filament in mind, but other rigid materials will surely work, too.
- For better structural integrity, give it thick walls when printing.
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I remember seeing a few of those earlier versions scattered around during Supercon last year. Think there's probably even a picture on my phone of a couple loaded up with badge boards being assembled.