Prusa Mini+ Upgrade Kit: problems, parts and running costs

Checked: 2026-10-25

Summary

The Prusa Mini+ Upgrade Kit is an aftermarket dual-Z conversion for the Prusa Mini+, not an official Prusa accessory. It is worth considering only if it is inexpensive and complete, and only after comparing it with official Prusa upgrades and simpler mods.

Common problems and fixes

Cantilever/single-Z wobble — a generic Prusa Mini/Mini+ community concern that motivates dual-Z mods, since the single-Z cantilever design can wobble; community dual-Z descriptions praise improved stability and precision versus it. Fix or workaround is not confirmed for this kit; generic mods add a second Z motor. Warranty is not stated for this kit. [4][5][6]
XY layer misalignment — a generic community concern reported for Prusa Mini/Mini+ machines and a stated reason owners pursue dual-Z conversions. No fix is confirmed for this kit. [4]
Z-axis unevenness — a generic community concern; uneven Z motion on a single-Z axis is a stated reason owners pursue dual-Z mods. [4][5]
No manufacturer page, manual or warranty — none found for this kit, and no support channel or parts list. Whether it affects the base printer’s Prusa warranty is unknown. [2][3]
Kit contents and firmware unconfirmed — exact included parts, tools and any controller or firmware changes were not confirmed. Generic dual-Z practice wires the two Z motors in series because the Buddy board has no separate ZL/ZR connectors, so wiring and firmware steps must be verified before buying. [5]
May require donor parts and disassembly — community dual-Z mods have used donor Prusa Mini parts, and value drops if extensive disassembly or donor parts are needed. [4][5]
Performance claims unverified — the 180 mm to 200 mm build height, ±0.04 mm accuracy, up to 200 mm/s and 30-40% oscillation reduction come from the listing and were not measured by any independent test. [2][3][4]
Identity confusion with official Prusa kit — the product is listed under “Prusa” but no Prusa Research page covers it; Prusa’s own upgrade kit is a different SuperPINDA product, and hotend or extruder upgrades from Slice Engineering and Bondtech are separate products. [8][9][7]

Parts and consumables

No replaceable parts or consumables reported.

Yearly running cost

Not enough data. No price, parts list, or electricity figure for this kit was found, so a yearly cost cannot be computed.

When it is a good buy

No price for this kit was found at any store, so no threshold can be set for it. Compare it against official Prusa upgrades and simpler mods before buying.

Named alternatives:

Official Prusa MINI to MINI+ upgrade kit — the SuperPINDA sensor-swap kit from Prusa Research, a documented manufacturer upgrade with support. The better choice when you want an official, supported upgrade rather than an unverified aftermarket conversion. [8]
Slice Engineering Copperhead hotend kit — a separate documented hotend upgrade for the Prusa Mini. The better choice when the goal is hotend performance rather than a dual-Z conversion. [9]
roboticious3d dual-Z Thingiverse mod — a free printable dual-Z design, not the sold kit. The better choice when you want to try the dual-Z concept at no kit cost before buying hardware. [3]