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Paul! I've been mullin' over the solid coupling thingie for a bit. I have some small aluminum U-joints left over from the days when potentiometers were used in vacuum tube radios... got me thinking: would a small u-joint have benefit in the application? I started bashin' around and came up with this:
https://www.grainger.com Grainger Item #1L730 (LOVEJOY, D2)
The aluminum ones may be too subject to wear, but THOSE steel ones are certainly strong enuff. Alignment would still be an issue, but not as much as with solids, IMO. You would need to drill/tap for grub screws too, but it may get you where you want to be with regard to eliminating the wobbly clips.
...just thinkin' out loud.
https://www.grainger.com Grainger Item #1L730 (LOVEJOY, D2)
The aluminum ones may be too subject to wear, but THOSE steel ones are certainly strong enuff. Alignment would still be an issue, but not as much as with solids, IMO. You would need to drill/tap for grub screws too, but it may get you where you want to be with regard to eliminating the wobbly clips.
...just thinkin' out loud.