I am looking for the same thing. I see the link in the experimental section to download the STL for the "E3D Titan Extruder" mount, but it's just an STL and even the description says it doesn't have everything needed for it to work. I'd like to use it as a starting point to build my own Titan extruder system for my gMax 1.5XT+ but would need a STEP file to work with. Would Kyle or anyone else from gCreate be willing to provide that for us?