Maker World does not allow you to upload a 3mf with custom Gcode, in the fifth image you can see the command that you must use for temperature changes, it is added in the right bar as custom G-code: “M104 S[Target temperature]”

Customised layered G-Code:
- layer 44: M104 S225
- layer 84: M104 S220
- layer 124: M104 S215
- layer 164: M104 S210
- layer 204: M104 S205
- layer 244: M104 S200
- layer 284: M104 S195
- layer 324: M104 S190

In this image you can see how to enter the custom Gcodes to set the printing temperature manually, you must also choose the maximum temperature as the printing temperature in the profile of your filament.

Towe Temp for PLA 230-190ºC

Tower Temp for ABS 270-230ºC

Tower Temp for PETG 250-220ºC

If your tower has a lot of threads between the cones, you can try printing this design and calibrate your retractions, I hope it helps!

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