Personally I would want to buy and own a design to do what i want with, and it looks like the design catalog will give you that option:
Continuing the discussion from Latest update (March '17): "Glowforge Design Catalog, which lets folks purchase either individual prints or unlimited access to the design"
I feel that one button press to get a finished piece is a bit optimistic, in that people will be using different materials, and laser tubes losing strength over time. Maybe a 24 hour rental is a bit much, maybe a 2 hour time limit?
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