Universal Spool Holder with quick On/Off-thread (quick release)

A week of use passed... (now 2022-08-28)

! works suprisingly well ! Super fast mount/unmount. Now I am changing spools "just like that". Am very satisfied with this design.

note: as there are three thread lines, if while at the spool it didn't grip immediately, simply rotate to the next thread line. One of three will instantly cach and grip perfectly.

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I have happily used my https://www.thingiverse.com/thing:1122261 spool holder but the quick nut got broken. Then I have made a simple nut https://www.thingiverse.com/thing:2864509 and it worked for me faithfully for many years more.
But...
I always longed for the quick mount option (but I wanted some kind of simpler one) so I have built this spool holder.

This thing is designed from scratch. However as I used the same dimensions as thing:2864509 , I mark it as a Remix.

It works simply by pushing the nut on the "rails" till it reaches spool and then just tighten it by slightly screwing it on the thread.

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