A "genetically engineered" (ge) printer from mostly Prusa (Mini) components. (Not saying it's a good name.)

Many components are from the Prusa Mini (https://github.com/prusa3d/Original-Prusa-MINI), including the control board (https://github.com/prusa3d/Prusa-Firmware-Buddy). Many plastic parts are original, though many were inspired by or used some geometry from the Prusa design.

The extruder is the MK3S+ R6 design (https://github.com/prusa3d/Original-Prusa-i3) with minor modifications. The belt-retention geometry of the x-carriage was mirrored to account for the motor being on the right side of the machine. The extruder-cover and extruder-body and extruder-cover were also modified to move the bed-leveling probe 5 mm towards the front of the machine. This was required to prevent interference between the bed-leveling probe and the build plate alignment posts.

Firmware changes are required to handle the different extruder steps, relocated bed-leveling probe, shorter filament path, and reversed operation of the filament sensor. The "gemini" branch of https://github.com/b-fitzpatrick/Prusa-Firmware-Buddy is based on the official 4.3.1 firmware. (Diff: https://github.com/prusa3d/Prusa-Firmware-Buddy/compare/RELEASE-4.3.1...b-fitzpatrick:gemini)

The Fusion 360 model started out nice, with parameters that could be changed to move the machine through its range of motion. Towards the end, it got a bit sloppy, as I just wanted to print and try the thing. I need to do some assembly clean-up to get it working well again.

I have a second Mini that I plan to convert. When I do this, I'll compile a BOM and document the assembly. In the meantime, in addition to the model, you can see more details in this video: https://youtu.be/Jrde_Tbfxjs

Known issues:

1. There are several assembly failures in the model, and the y-axis motor and tensioner are currently out of position.