Original Prusa i3 MK3/S/+ to MK4S upgrade kit

Why is our price different than buying direct from Prusa?  Click here to read our article on our pricing. This is the full upgrade that also contains the MK4’s new X/Y precise motors (400 steps, 0.9°per step). It’s the most expensive of all three, but last time you voiced your interest in a full MK2->MK3 upgrade pretty strongly, so we decided to give you a full MK4 upgrade as well. :-)   Before you order the upgrade, please check which PSU your printer came with and which version of the heatbed connector is installed. This kit only works if you have the black power supply and not a silver power supply. Your heatbed must have screws and is NOT solder on.       This product is supplied as a kit - you must assemble it yourself!Printed parts are NOT included! Please print them before you disassemble your MK3S/+! The filament is included in the upgrade package. Important: The black injection-molded spool holder is not part of the upgrade package. If your printer didn't c