This is a dock mounted 6 slot cartridge holder for the Nintendo Switch which is locked into place by the door on the back of the original Switch dock - since the door makes a great snap in mounting point.
Should print without any support in the default file orientation, I don't think it would print well rotated from the default orientation without a lot of post processing. Please note, this holder needs to sit on the right of the switch dock, aligning the semi circular cut outs on the print with the protruding tabs on the inside of the Switch dock door.
Let me know in comments how you go with the fit, my printer does pretty close to scale - maybe a tad under. Had some mild oozing issues inside the cart slots which made some of the slots a little tight for me, but if your printer is dialed in better than mine it should be fine - or it can probably be fixed with a hobby knife.
For now a small six slot, future plans are a longer version running most of the length of the switch, possibly 2/3 tiered to show of a large collection of carts.
Disclaimer: please use at your own risk - I take no responsibility for this thing scratching your switch dock, setting your house of fire, or your kids/pets turning this into an easy access all you can eat Switch cartridge buffet.
*Update (26/07/2017): Version 3, slimmed down the slots so carts can less easily fall sideways. Still a little loose as I didn't want the carts to be scratched. Includes V2 changes.
*Update (14/03/2017): Version 2 added a little more room for airflow if that is a major concern - although between the HDMI cutout on the dock and the gaps to the side of the holder it shouldn't be.
Shouldn't need to use support if you print the file in default orientation.