I would hope in future iterations / versions of the GF that they would do two things.
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Move the fan to the center of the unit on the back or to the back right side. Currently it drags the smoke past the laser output window and the input window on the head. This causes both to need frequent cleaning or your get dull cuts (cuts where you need more power to get all the way through on PG mats).
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Make the fan a cartridge that can be removed, cleaned or replaced easily.