2023年Q1 Prusa Research (チェコ・Prague拠点・2012年Josef Prusa創業・Open-Source Hardware 3D Printer老舗) 発売のOriginal Prusa MK4・Open-Source Hardware FDM 3D Printer Flagship・250×210×220mm Build Volume + 200mm/s高速 + Nextruder (Quick-swap Nozzle) + Auto Bed Mesh (Strain Gauge Loadcell) + 32-bit Buddy Board + open-source firmware (PrusaSlicer)・$1,099 (Kit) / $1,299 (Assembled) ・Bambu Lab P1S直接競合のOpen-Source / Czech-made信頼性志向Mainstream FDM 3D Printer。