Hygrometer Swirl Bracket

Description

I liked the the [Humidity Gauge Spool Bracket](https://www.thingiverse.com/thing:4640997) by LoboCNC, but it neither fit well for my hygrometers (had to scale it up to 103%) nor many of my spools which have a lot of different hole sizes. Therefore I designed my own variants of holding swirls for different type of spools - large (~ 83mm) fits spools with a larger hole on one side (e.g. Eryone, Creality, Janbex) - medium (~ 76mm) fits spools e.g. from Xingtong Zhi Lian - small (~ 53mm) many spools and also back side of Eryone, Creality, Janbex, etc. The silica granulate I keep in little Organza bags, which I can directly dry i the oven (90° - 110°) if the silica has been "soaked" and changed its color from orange to green. That's an important advantage to 3D printed Silica boxes, which I would never heat up like that in the oven. But to avoid the Organza bags from moving around inside the sealed bag, I also added a little cage cap to lock them in the spool hole. Update 2020-11-22: Added a "slim" version of the large swirl clamp, because the 12mm wings don't fit well for some Janbex spools. Reduced the wings to only 8mm wide. I also added a large grid cap (for ~82mm holes) and an extra small one for only 50mm holes I found on some spools. Extended the wings though, so that they should still fit most spool with slightly larger holes. Update 2020-12-04: So many different spools ... I will have to give up the simple categories small/medium/large :-) Added another pair for approx. 72 mm, e.g. for Sunlu and two pairs for Tianse spools, which have an extra large hole 90mm on one side and only 56mm on the other side (need one large and one small - your choice on which side you put the hygrometer or grid cap, ---- __Update 2021-07-22__: I decided to add more sturdy variants of all swirls and grids, because the old versions where rather weak and either fell off the spool or the swirl was sucked into the spool hole when deflating the bag. The new variants are __optimized for 0.5mm line width__ (125% with 0.4mm nozzle) and the walls are now 3 lines, i.e. 1.5mm thick. Uses slightly more filament, but holds much better. The new variants are marked with '-S-' for __s__turdy or __s__trong. ---- Normally the hygrometer swirls are 12mm high, the caps only 6mm - with some exceptions because some spools have drafted holes, opening to the outside - need more height then.

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