
Night, bronze
Compact Colosseum
A curved piece of the ring with up to four laptops hidden inside, 0.95 m tall.
Designed and checked in CAD. Not built in real life yet.
€24
Standard plan. Every computer count included.
Inside
Take it apart
Size
How many computers?
- Height
- 0.95 m
- Footprint
- 80 × 49 cm
- Computers
- 4 laptops
- Power
- 1 power supply, 120 of 260 W
- Filament
- 13.5 kg
- Print time
- 717 h
- OrcaSlicer estimate, ±15 %
- Weight with boards
- 17.5 kg
- Parts and filament, without boards
- €471
- With used laptops (€40–60 each)
- €631–711
About this model
A curved section of a Roman amphitheatre in the style of the Colosseum: three storeys of open arches with Doric, Ionic and Corinthian half-columns, a solid attic with small windows on top, and one end broken off in steps the way the real ring is. Behind the arches runs a corridor, and behind that a solid inner block. Each laptop blade stands in that block, one per bay, so from outside you look through the arches at the corridor and a plain wall, never at a board. You pick 2, 3 or 4 computers and the ring grows by one bay each: 0.95 m tall every time, about 0.48 m wide with two and 0.80 m with four, about 0.49 m deep. Air comes in through the arches, drops through the lattice floor of the corridor into the hollow base, rises past each board and leaves through the lattice fronts of the seat steps on top. At night LED strips under the corridor floors light the arches from inside. One 260 W supply runs everything; the supply, the network switch and the shared disk lie in the base under the block. To swap a blade you lift the seat steps above it and pull the blade straight up by its tab.
Worth knowing
About 8.1 kg of filament with two computers and 13.5 kg with four (roughly 330 to 540 hours on a fast printer). The ring is a segment, not a full oval: a closed ring that holds even two laptop boards would be over a metre across. The block walls and the arches carry the top; the blades only stand in their shoes. The seat steps are held by their lip and weight, not glued, because they are the way in.
Shopping list
What to buy for it
| Item | Qty | Price each | Where |
|---|---|---|---|
| Shared supply MEAN WELL GST280A20-C6P | 1 | €93.80 | Shop |
| Mains cord C13, 2 m, one per supply (not in the supply's box) | 1 | €3.60 | Shop |
| Supply output lead Molex 215328-1061 | 1 | €5.20 | Shop |
| XT60 pigtails, 5 + 5 pack (one pair per blade) | 1 | €11.09 | Shop Ad, affiliate link |
| Wago 221-412 (2-way), single pieces: 4 per blade (red+fuse, fuse+white, black+black, blue alone) | 16 | €0.55 | Shop |
| Wago 221-415 (5-way), single pieces: 4 for the bus + 2 per extra supply | 4 | €0.80 | Shop |
| ELNONE board plug, 2 pack (one per blade) | 2 | €8.56 | Shop Ad, affiliate link |
| JZK 5015 USB fans, 4 pack (one per blade head) | 1 | €13.61 | Shop Ad, affiliate link |
| Fuse holders, 5 pack (blades) | 1 | €6.82 | Shop Ad, affiliate link |
| 5 A fuses, 10 pack | 1 | €6.75 | Shop Ad, affiliate link |
| Keystone couplers, 10 pack | 1 | €14.36 | Shop Ad, affiliate link |
| Patch 0.25 m, 10 pack | 1 | €12.85 | Shop Ad, affiliate link |
| Patch 2 m, 5 pack | 1 | €11.09 | Shop Ad, affiliate link |
| Switch Cudy GS105U 5-port | 1 | €13.01 | Shop Ad, affiliate link |
| USB charger 50 W, 5 ports | 1 | €9.52 | Shop Ad, affiliate link |
| OULARA COB USB strip 1 m (under the ambulatory floors and the terrace, they light the arcades) | 3 | €14.11 | Shop Ad, affiliate link |
| XT60 1 m extension leads along the block to the bus at the supply (one per blade) | 4 | €11.09 | Shop Ad, affiliate link |
| M3 screws, 300 pcs | 1 | €14.05 | Shop Ad, affiliate link |
| Translucent PETG 1 kg (eSUN transparent orange) | 1 | €12.37 | Shop Ad, affiliate link |
| Opaque PETG 1 kg spool (eSUN black, budget; sold as a 4 kg bundle) | 14 | €9.07 | Shop Ad, affiliate link |
| Total, without boards | €471 | ||
Prices with VAT as shown in October 2026. Shipping, glue and the boards are not included. Also not counted, if you do not own them: a multimeter (about €8.56) and a power strip (about €15.12).
Budget black PETG.
Drives: every board keeps the drive its laptop came with (system only), so there is nothing to buy. A board bought without one needs a 256 GB M.2 2280 drive (approx. €56). Optional, not in the total: one shared disk of 1 TB or more for the render manager's shared folder, on one laptop board, in its own M.2 slot, or in a USB case (approx. €19) on the base floor. Reuse an old one, or buy a 1 TB M.2 2280 drive for approx. €136–146. Drive prices are approximate (October 2026): check before buying.
No printer yet?
To print it at this size: 13.5 kg of PETG. Add 10% for waste and test pieces and that is 15 spools of 1 kg, approx. €210–285 with the PETG below (the shopping list above already includes filament). Print time, estimated: about 717 h with the standard 0.4 mm nozzle (Ender-3 V3 SE class), 447 h with a 0.6 mm nozzle.
Print times are slicer estimates (OrcaSlicer) and may vary by ±15 %.
Advertising: the links in this list are affiliate links. If you buy through them I earn a small commission. The price for you does not change.
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Printers that take every part (bed 220 × 220 mm or more): Creality Ender-3 V3 SE (€169) · Bambu Lab A1 (€259) · Bambu Lab P1S (€379)
PETG: Elegoo PETG Pro, 1 kg (€13.99/kg) · Bambu PETG Basic, 1 kg with spool (€18.99/kg)
Prices as shown on each shop's own page in October 2026. Shipping and the final VAT are added at checkout.