Reprap extruder mods

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I designed a 3D printer, using traditional methods to create the parts that normally get 3D printed out of wood. I crafted my own custom arrangement (out of wood) for the extruder and cooling fan, among other components. This setup proved sufficient to print the 3D printed parts and a few additional items. However, when I assembled all the parts for the Reprap extruder and prepared it for testing, I encountered an issue: the filament couldn't pass through the hole following the drive spline due to a 3mm misalignment. I corrected this problem by realigning the components. After two more prints with adjustments, my final third print came out 3mm higher than intended and 3mm wider to the left of the stepper motor mount (see image). Additionally, I had to adjust the extruder idler because it was 3mm too long, causing misaligned holes for the springs (not part of my modification). I also created a new pin for the axle of the extruder idler, as the original 3D printed axle wasn't sufficient. Fortunately, this new pin fit much better. With all adjustments made, the unit now operates correctly, but the top hole no longer aligns properly due to the modifications. However, the lower pair of holes remains in place. As a result of these changes, the unit is slightly lower than its original height, but its functionality isn't affected. I've included an image comparing the original and modified versions. Thanks to my new extruder system, I've successfully printed the Iris with four leaves, and it works perfectly! Attached files include the new extruder design and extruder idler, both printed using a 0.4mm nozzle at a 0.2 layer height.