So I wanted to support magnets, screws, and the stackable baseplate with this design. Too bad I didn't search first cause apparently plenty of others have beat me to it. Regardless, I thought I'd add a ton of curves and hopefully make this easy to print quickly rather than be reinforced and fancy in those regards.

Vase Mode 1x1 Gridfinity Bins

Gridfinity-Spiralized-1x1x6u.stl

I bought a 5kg spool only to find out my printer did not have the capacity to hold a spool with such girth. This spool holder can hold the smallest of spools and could probably hold something wider than the 3kg spool I designed it for.

This requires some hardware
4x Bearings (7mm depth, 22mm outer diameter, 8mm inner diameter)
2x Rods (5mm diameter, 300mm length)
(optional) 64x Magnets or 3mm screws (the top and bottom of the Roller mounts can be outfited with these, but does not require them)

For the full Assembly you want to print
4x Roller Mounts
4x Rollers (I printed these with the wide end downwards, and support to hold them, despite them being 45 degree angles, I found this mostly helped for bed adhesion)
4x Bearing Rod Adapter

Don't print the Assembly file, that's for an idea of scale and how to put things together.

Place bearings into the roller mounts (I used a bit of glue, though they should press fit decent enough)
Place rollers onto the rods. If they snap, don't worry! The rod is the strength here, just slide em on anyway.

Rod adapters were made a separate part on the off chance my bearings are weird, I got them from a toy store.

You can likely scale down the rollers to make the design smaller, but I wanted a one-size-fits-all solution and I bought these rods for a different project and was stuck with them.

Self Centering Gridfinity Spool Holder

Assembly.stl

A Klein bottle made to be gridfinity compatible!

The bottle sports a 12mm entryway at the base, which curves into the bin itself.

Kleinfinity Bottle

A klienbottle made to be gridfinity compatible!

The bottle sports a 12mm entryway at the base, which curves into the bin itself.

Klienfinity Bottle

Are you like me? Did you print the basic hextraction board because you were unsure if the game was going to be fun, find out 100 printed tiles later that it is indeed fun and then decide gutters would enhance it greatly only to realize that using superglue to piece everything together removes the possibility of reasonably upgrading your existing board? Then I have the part for you!

This is the fancy gutter, with a cutout where the clip would be to allow it to be placed above existing board clips.

Additionally, the tabs that fit into the grid on the sides are chamfered to allow this to be printed with no supports, provided your printer can handle the overhang.

Finally, Zack, if you're reading it, what printer do you own that can't print the tiny overhang of a tile, but can print this ungodly gutter, and in what orientation? what supports? How?

Hextraction - Basic Board Gutter Upgrade

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Vase Mode 1x1 Gridfinity Bins

Self Centering Gridfinity Spool Holder

Kleinfinity Bottle

Hextraction - Basic Board Gutter Upgrade