Round table leg extender

I needed this round table leg extender, because I bought a Ikea Kallax 2x2 shelving unit as a deskstand below a Linnmon desk top with 2 Adils legs (round 40mm). I needed 60mm extension and made this extender with 40mm overheight, with a 40.5mm hole, where the legg will fit. The outside is a little bit arty.

I discovered that the pattern wasn't equal. This is solved in the 2nd version STL, which is added here, but I continued the V1 print. In the export from Inventor the circular hole isn't circular. I grinded it up a little to fit on the round 40mm legs, but it fits and holds perfect.