Desk repair with 3D printing

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As a Navision / Business Central consultant, developer and programmer, I feel I've had a solid grounding for decades. And I have also repaired my house in Söhrewald (together with my father-in-law and many other hard-working helpers) quite satisfactorily. I also got a Mercury 50 hp outboard running again together with my brother. So it shouldn't be a problem to install an ICY Box Mini cable feed-through with power plug and USB port in my new height-adjustable desk !?

So I quickly got out the Makita cordless drill, picked out the bolt circle disk corresponding to the counter nut (screw connection), placed it roughly and ... started sawing!

It went so well and easily that I immediately vacuumed away the wood shavings with my other hand.

And the result: a wonderful, far too big hole!

And now? Use the "make it smaller" saw? Unfortunately, it doesn't exist yet...
I actually helped myself by first fixing the grommet asymmetrically and then a few days later, after the blood pressure had dropped again, I thought about what I could do.

Reducing rings were not available in this size. I didn't trust myself or my tools to saw a large hole in the sawn-out wooden disk and use the remainder as a reducing ring.

And indeed: after a few days with balanced blood pressure, I "somehow" came up with the idea that something could be done with 3D printing! I quickly found Mr. Arne Heerde nearby (Bettenhausen/Kassel), with whom communication was very quick and uncomplicated. Other 3D studios I approached wanted a lot of money for the design. Just one day later, I had the first ring in my hand: too big on the outside, too small on the inside.

I think I'm a pretty good Navision/Business Central programmer, but this is the second time I've completely failed with the ruler and folding rule!

So I gave Arne the new, hopefully really correct measurements this time.

Just two days later, the new finished ring was on my doorstep.

And now it really fits perfectly! It held its position without any glue, but with a little hot glue it is now bombproof. And the ICY box sits as if it never belonged anywhere else!