Is your custom Ikea Lack Enclosure imitating the Leaning Tower Pisa? Adding this print to the bottom of your enclosure's feet will help you level your Lack and compensate for an uneven floor or carpet.

Furniture leveling screws provide an easy way to add fine adjustment to existing furniture, but the legs of most Ikea Lack Tables, are too thin to support the T-Nut of an adjustment screw.

This model has recesses to accommodate the teeth of a T-Nut (& prevent them from spinning), and creates a firm base to distribute the load of the nut across the entire Ikea foot.

I designed this to accommodate these heavy furniture leveling screws from Amazon (which I've used on a few other woodworking projects), but this print should work for most T-Nuts sized for a 5/16"-18 threaded screw.

The print is sized to fit fairly close to the table leg, but they will drop off if you lift your Lack, so there's also a small chamfered hole to add a very small screw simply to hold these feet in place.

The second photo shows how how they level my three lack enclosure in my (admittedly messy) workshop.  I printed mine in generic PETG (from Microcenter/eSun I believe), and they've been in place for 8 months (& a lot of printing), and still work just fine.