Description

Lego Base Topper for Companion, TheCube

Transform TheCube’s flat top into a limitless building zone. TheCube Lego Base Topper is a precision-sized plate whose standard-pitch studs let you snap on bricks, minifigs, sensors, or whimsical micro-scenes without tools or adhesives—perfect for personalizing your desk companion or prototyping add-ons. A gently radiused skirt mirrors TheCube’s aesthetic, while underside alignment nubs ensure a wobble-free fit to the stock top plate. Fits atop any Cube format.

Key features

Universal compatibility – Matches official Lego® stud spacing for reliable connections.

Low-profile design – Adds only ≈ 8 mm to TheCube’s height, keeping the overall silhouette compact.

Rigidity where it counts – Honeycomb internal structure balances strength and weight, so larger brick builds stay stable.

Easy swap-out – Sets on TheCube’s magnetic topper interface in a snap—no screws, no fuss.

Bridge to creativity – Use bricks to mount sensors, route cables, or display minis; when you’re done, pop the plate off and start fresh.

Print parameters

Tip: For maximum stud fidelity, print the top surface facing upward and enable horizontal expansion compensation of ≈ -0.05 mm if your printer tends to oversize pegs.

Post-processing & assembly

Add Magnets and glue them in place with super glue. We use 12mm x 2mm magnets. There's also room for a mini NFC tag so TheCube knows there's topper there. (You'll have to program the NFC tag. See our Github: https://github.com/Companion-TheCube.)

Glue together the two pieces with super glue. We clamp ours together while the glue dries.

Deburr studs with a light pass of fine-grit sandpaper if needed.

Test clutch using a sacrificial 2×4 brick; adjust with gentle heat if studs are overly tight.

Build away! Whether it’s a miniature weather station, an LED matrix, or a dragon lair, your Lego Base Topper is ready.