Uploaded February 2026 | Updated September 2026, 2 weeks ago

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Obsolete? Not these printers! This Prusa MK2 is nine years old, almost old enough to have finished grade school, but you can upgrade it through three generations of printers all the way up to 2025’s Core One.

This video was not sponsored. We've built and worked with a lot of printers over the years, and we're glad to see Prusa's approach to repairable/upgradeable hardware.

But we've historically really appreciated Prusa's open source model, and now that seems to be changing. They've shifted to what they're calling an "Open Community License." We invited Alan Puccinelli to explain that shift and show us some repairs inside this machine.

Video credit:
#01 Original PRUSA MK4S Kit Full Step-By-Step BUILD GUIDE - Unboxing & Preparation
youtube.com/watch?v=tnlXlj5EBZ0

Free 3D Printed Repairs for Strangers
youtube.com/watch?v=ArBCCkSGhFk

How To Set Stepper Motor Current VREF on Ender 3
youtube.com/watch?v=k2nm-WetPnU

OhmEye's Introduction and Orientation for 3D Printing with the Reprap Prusa Mendel
youtube.com/watch?v=B3D56IpACME

Was Upgrading my 3D Printer Worth It – Mk3.5 Upgrade
youtube.com/watch?v=qLoR3bqujxs

Prusa Core One Time Lapse
youtube.com/watch?v=SS6XUf9TxN4

PRUSA i3 MK3S+ 3D Printer Complete Assembly Guide, Every Detail Covered
youtube.com/watch?v=uToqSlh64R4

#05 Original PRUSA MK4S Kit Full Step-By-Step BUILD GUIDE - Nextruder Assembly
youtube.com/watch?v=RtncUu8AlS8

Prusa CORE One Conversion Kit Build Day 4 - Nextruder & Enclosure
youtube.com/watch?v=-_w2qsKpRa0

PRUSA IN 2024 How We Make Our 3D Printers
youtube.com/watch?v=s8DybBlX55k

Chapters
00:00 Obsolescence-Defying Printers
00:31 Prusa’s Open-Source Roots
00:59 3D Printing Powers Repair
02:05 The Complexity & Value of 3D Printers
02:40 Meet Alan Puccinelli from Prusa
03:12 Upgradeability & Repair Philosophy
04:41 MK4S Upgrade Path Explained
05:49 Exploring Prusa Machines
05:57 Core 1 Nozzle Replacement Demo
07:14 Extruder Assembly Maintenance Tips
09:01 The Challenge of Open Source Competition
10:18 The New Open Community License
11:17 Prusa & Open Source Community Evolution
12:23 Collaborations With Major Brands (Phillips)
13:38 Limitations & Advantages of 3D Printing for Repair
14:03 Repairable Design: Prusa vs Competitors

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