STEP 1 Upgrade manual info
This manual guides you through
upgrading your Original Prusa MK4
to MK4S or MK3.9 to MK3.9S, with
all instructions applying to both
upgrades.
NOTE: The provided pictures
feature the MK4S, so you may
notice MK4S logos across the
manual.
STEP 2 Preparing the upgrade kit
Please prepare the upgrade kit
received from Prusa Research.
MMU3: This manual also includes
instructions for MMU3 owners.
These instructions are separated
and indicated in advance.