Shifting the X-axis to E1 (Marlin firmware)

Actually nothing to do with the MP3DP.

However, during tinkering with my MPCNC I fried the X-axis on my Ramps 1.4 shield, as I put the driver the wrong way in. The other 4 axis were still running.

Is it possible to shift the X to E1, without tearing the whole firmware apart, so I could still use the board on my Ender 3, which has just 3-axis and 1 Extruder anyways. Eventually switching to TMC 2XXX.

You can just swap the pin assignments for X and E1 in pins_ramps.h.

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