# Upgrade kit CORE One for Original Prusa MK4S 3D printer by Prusa — DIY assembly, new xLCD version

**URL:** https://aio.lv/en/product--prusa-psa-26749--12219451
**Data updated:** 2026-03-27 14:01 (EET)
**Category:** 3D Printer Consumables
**Manufacturer:** Prusa
**Manufacturer code:** PSA-26749
**EAN:** 8594173672062
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 617.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 510.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--prusa-psa-26749--12219451

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Prusa CORE One upgrade kit for the Original Prusa MK4S is a DIY modification package that replaces the printer's motion system with a CORE XY setup. This kit, marked as the new xLCD version, is intended for users who want to upgrade mechanical motion and control interfaces on their MK4S. It requires assembly and mechanical integration into the existing printer and is suitable for experienced hobbyists and technicians aiming to improve print dynamics and workflow.

## Long description

The Upgrade kit CORE One for Original Prusa MK4S 3D printer by Prusa — DIY assembly, new xLCD version is a modular conversion package designed to replace the standard motion system of the Prusa MK4S with a CORE XY arrangement. The kit provides hardware and components to adapt the printer's kinematics and integrates a new xLCD control interface. Intended for users who are comfortable with mechanical assembly and electrical integration, the kit changes the motion layout to improve printing dynamics while keeping compatibility with the MK4S frame and electronics layout where applicable.
Advantages
The CORE XY motion system included in this upgrade kit offers more efficient belt routing and potential for higher inertial performance compared with traditional Cartesian arrangements. The new xLCD version provides an updated user interface that can simplify control and status monitoring during prints. The kit is supplied for DIY assembly, allowing experienced users to customize installation and maintain original printer components where possible. Designed by the same manufacturer of the original printer, the upgrade maintains mechanical compatibility considerations and follows recommended mounting points for the MK4S.
Suitable for
 Experienced hobbyists or technicians converting an Original Prusa MK4S to CORE XY kinematics
 Users seeking improved print dynamics and potentially higher travel speeds
 Workshops that perform mechanical upgrades and customizations on existing MK4S units
 Those who prefer a DIY assembly process and are familiar with printer maintenance
Key specifications
 Motion topology: CORE XY conversion kit designed for MK4S integration
 Control interface: updated xLCD control panel included in this version
 Assembly type: kit for DIY mechanical and electrical installation
 Compatibility: designed specifically for Original Prusa MK4S frame and components
 Included components: structural parts, belt routing hardware, idler/pulley assemblies, mounting brackets, and display module
How to use
Installation requires disassembly of parts of the MK4S motion system and careful substitution with the CORE One kit components. Follow the provided assembly instructions step by step to mount structural elements, route belts according to the CORE XY layout, install idlers and pulleys, and connect the xLCD module to the printer's control electronics. Electrical connections and firmware or configuration adjustments may be necessary to ensure correct motor direction and axis mapping. After mechanical installation, perform axis calibration, belt tensioning, and test prints to verify correct operation.
Usage recommendations
Use the kit only with a properly powered and maintained MK4S printer. Verify all mechanical fastenings and belt tensions before operation. If unfamiliar with firmware configuration or motor wiring, consult official Prusa documentation or a qualified technician to adjust axis mapping and ensure safe operation.

## FAQ

### How much does the Prusa CORE One upgrade kit for Original Prusa MK4S cost, and is it available for purchase?

The price is 617.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Prusa CORE One upgrade kit for Original Prusa MK4S be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Prusa products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Prusa service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12219451/68544838_large.webp