Hi, this is a simple mounting bracket for a geared stepper.

Why did I do this? Just because I had some issues my old stepper couldn't press the filament through the Bowden.
Now everything works perfect and the print quality also increased.

(To calculate the new steps per mm use this formula: (length how it should be/actual lenght) x steps per mm = new steps per mm
example: (50/51,5) x 104,5 = 101,46)

Have fun

geared stepper motor (3.71):
https://www.aliexpress.com/item/Free-shipping-4-lead-Nema17-Stepper-Motor-42-motor-Extruder-Gear-Stepper-Motor-Ratio-Planetary-Gearbox/32843475376.html?spm=a2g0s.9042311.0.0.2fcf4c4dMSoLqL

8mm bore extruder gear: https://www.aliexpress.com/item/1Pc-Makerbot-MK7-MK8-Extruder-Driver-Feed-Gear-Wheel-40-Teeth-11mm-12mm-Bore-5mm-8mm/32677184370.html?spm=a2g0s.9042311.0.0.2fcf4c4dMSoLqL