E34M1 EVA 3 Toolhead for Ender 5 Pro & Plus - Stock Cartesian & Endorphin - MGN12H MGN9H, Single 6mm Belt , Front , Z Rod Drop Bracket

Work In Progress - Some parts not fully tested.

Remixed parts to upgrade Ender 5 on a budget with the option of later upgrading to Mercury One.1 or Endorphin.

EVA 3 is easily one of the best tool heads and the awesome E34M1 design provides a huge choice of hot end extruder combo's and probe options with superior cooling.
With this design the belt grabbers have been relocated to the front giving it a slimmer rear profile allowing more travel so there is no loss of print area.

Works with stock Ender 5 , Pro and Ender 5 Plus and Endorphin Mod. 

Project Links

• E34M1 Toolhead - https://jon-harper.github.io/E34M1/ 

• Endorphin Mod - https://endorphin3d.com/ 

Compatibility 

Print all main parts from the E34M1 Project page except for the Top and Front. Select a Top and Front  below depending on your linear rail choice. 

For Ender 5 & Pro - 300mm or MGN12H or MGN9H. The design Is compatible with Stage 3 of the Endorphin mod if you already have a MGN9H 350mm as per the Endorphin BOM.

For Ender 5 Plus - 450mm MGN12h or MGN9h

Personally I recommend going with MGN12H so you will have the option of upgrading to the Mercury One.1 later on. 

Recommend using Mercury One.1 cable guide mounted on the back of the frame. 

Print Area

Usual print area for the Endorphin EVA 3 with 'Stage 3' on the Ender 5 is 220 x 190. This mod restores the usable print area to stock 220 x 220 with no offset with MGN9H and only 2.5mm offset with MGN12H with stock V Wheels on the Y axis.

V-wheels on the Y axis have less travel so upgrading to rails on Y axis will eliminate any offset. Most Ender 5 stock linear rails mods that place the rails on the outside of the frame will be compatible.

Parts Details

• Front - 6mm Belt Grabber - Remixed for a single 6mm belt. V1 directs belts out the sides like stock. V2 has been altered to direct the belts out the back making the belt path 3.4mm closer to the X Gantry. Recommend V1 for MGN9H and V2 for MGN12H.

• Top MGN12H - Bolt holes moved forward so the entire toolhead sits further back on the MGN12H carriage. This moves the belt path closer to the X gantry by 4mm and increases the Y Travel when using rails.

• Top MGN9H - Heightened by 4mm for the smaller carriage and sits further back by another 2.5mm for exact stock nozzle position with no offset on Y.

• X Axis Stop & Rail Block - For actuating X axis switch on toolhead with 10mm overhang for adjustability. (fpr use with Tops using 896f limit switch, microswitch and sensorless) 

• X Axis Stock Switch Stop & Actuator - For mounting Stock X Axis switch onto X gantry. (for use with Tops with 896F limit switch holes).

• Z Rod Drop Brackets - Drops the Z rods 16mm allowing extra Y travel on Ender 5 and X on the Plus. For Ender 5 Plus use with the Mercury One.1 Bed Risers (link above).

• Y Axis Stop Block Arm & Switch Mount - Ender 5 & Pro only. Adjustable switch mount and arm that mount on X Gantry.

Additional Hardware

• 4 x M3x8mm Bolt (Socket head)

• 4 x M3 2020 T Nut  

For X Axis stop block, X Rail Stop, Y Stop Block Arm and Y Stop Switch Mount.

• 4 x M5x10mm Bolt (Socket or Button head)

• 4 x M5 2020 T Nut

For underneath of Z Rod Drop Brackets.   

Updates

07/11/2026 - Added New X axis Stock Block v2 and X axis Stock switch mount and Actuator.

19/09/2026 - Added and updated MGN12H Top and added Microswitch and No endstop for sensorless homing versions for MGN9H.

06/06/2026 - Added Endstop Anchor for MGN9H and longer X Switch Stop for X axis.

19.02.2026 - Updated Z Rod Drop Bracket to be compatible with UHF Beacon Duct.

17.02.2026 - Redesigned Z Rod Drop Bracket. Allows extra 5mm of travel for full 220 x 220 printable area without the 5mm offset.

16.02.2026 - Added Endstop Anchor for Left or Right side switch option, Y end stop block arm and switch mount and various tweaks on other parts.

15.02.2026 - Added Z Rod Brackets. Added X Axis Rail Stop.

14.02.2026 - Added V2 Front and Endstop Anchor for optimised belt path.

13.02.2026 - Added X Axis Stop Block