1405 300mm No Sag, Printrbot Simple

I have modified my previous 300mm No Sag to work with the 1405 Makers Simple. I am a believer of active cooling, so I have included provisions for fans for the extruder motor, hot end, and part. These are completely optional, except the extruder fan which is required for the E3D and Hexagon versions.
This version is compatible with both the 1405 Printrbot stock YZ plate or the included printed plate and can be configured as both single and double precision. The benefit of using the the inclu