This is designedfor ppl who want the trusty Titan from E3D on there MK3 printer.
Its R3 based extruder with Bear X axis upgrade rear for easier access .
Its 1:3 gear ratio will increased the resolution by 3 and u should adjust the E steps for it as result . (put M92 EXXX in your start code)
Its supposed to help with the known inconsistent extrusion issue .