Light tables like IKEA LACK family are not sturdy enough to withstand horizontal vibrations caused by a printer, they start shaking and wobbling worsening print quality, causing even more ringing, etc. This simple brace will make a table MUCH more stable.

The holes are designed for 4x16mm (or longer) tapered screws.
Be careful, the table is mostly air inside, don't overtighten the screws.

I printed this using Prusament PETG Signal White, but PLA would do as well as there's not much load on these elements.
0.30mm Layer height, Draft quality.
Depending on your conditions (drafts, enclosure, etc.) you might want to consider a 3-5mm brim to prevent corner lifting.

Please LIKE if you like :D

p.s. Feel free to request other sizes.