I haven't been able to get one of the Jenkins Spindles for my wife so I figured I'd design one myself.  I took inspiration from their designs and from Snyder Spindles.

There are three sizes of spindles.  I believe the large is similar to the Jenkins Aegean or the Snyder Large.  The weights feel good and they spin nicely.  My wife tested them and had good success (although she's new to spinning so her taste may not be refined).

Fitment

The holes in the cross bar parts that the shaft goes through are tapered.  So if you want the cross to sit further up the shaft, you can try scaling the shaft in its short dimensions by a little bit (try a percentage point at a time to feel it out).

If you run into issues getting the inner cross bar to fit into the outer one, I'd suggest trying to figure out if the width or thickness is the problem and adjusting scale only in the corresponding dimension.  Personally I didn't have any difficulties with fitment between the cross bars or from the shaft.

Printing

I printed these models in both PLA and in ASA and they work fine either way.  Given that they're long and have small contact on the ends, ASA / ABS might give you some troubles but you can get through them.

Color Changes

If you want to match the stripes in the first few photos, I'd recommend the following color changes (assuming you're doing 0.2mm layer height):

• Large: layer 33 & 37
• Medium: 32 & 36
• Mini: 28 & 32

PLA

These should be pretty straightforward to print in PLA since there's not a lot of warp potential. If you tend to have adhesion issues, then you'll probably have trouble with the inner cross bar in which case I'd suggest turning on a brim or reigning in your max part cooling.

ASA / ABS

If you print in ASA or ABS, be sure to scale the shaft and outer cross bar to 100.7% in all dimensions.  Also scale the inner cross bar by 100.7% only on the long axis (length).  Make sure not to scale the inner cross bar on thickness or height dimensions.

I also found that it was necessary to use a brim.

Cooling and temp settings are highly printer-dependent, but on my X1C I was trying to dial in Flashforge ASA Burnt Titanium which is pretty finicky.  I ended up using: