Does anyone have a file for a printable tool to help me when I

Does anyone have a file for a printable tool to help me when I align the rods and tighten the spectra. I am sure I remember reading about it but cant find it anywhere now I am looking for it.

I am not entirely sure how it works but if it makes my life easier I am all for it!

I have some clamps that keep the shafts parallel, I post the design once I get a spare moment.

Not at home for a couple of days, so no rush.