I was surprised that there was no decent spool racks for Ikea Lack tables - so I designed one!

This used 2 off 600mmx19mm dowels like this per rack: https://www.amazon.co.uk/dp/B098NPLKCG
If anyone would like a version that supports different wooden rod sizes just comment and I will add.

Print it in the rather odd orientation that I have using a brim to give good strength across orientations.

I used 0.28mm layer height with 3 walls and 15% infil for strength - its not a pretty profile but is reasonably quick and strong. I also use up remains of spools to make this and you get a nice effect with the diagonal printing with multiple colours.
If you are leaving the rack at the bottom of the table legs like the one I have at the front of the picture you do not need any screws to hold it in place, however if you want it raised up as I do with the one on the back you need a couple of M4x20 screws.