Hello,
I'm the builder of this model.
I have not taken part in the community until now, except for some occasional YouTube videos, because I already have little time to actually "play" with LEGO as it is and I'm afraid participating in forums might end up eating a large chunk of that time.
Anyway, because I witnessed a surge in YouTube views spawned by this thread, I figured it might be the time to give back to the AFOL community, so here I am.
For people looking for building instructions of the OVERKILL AWD, sorry but I dismantled the beast without making instructions first. However I think I have detailed video footage that was not used in the final video, notably of the portal axle with tilted kingpin, so I might be able to model the axles in LDD (well, without the 3D printed parts and if I ever find the time and courage, that is).
Now regarding 3D-printed parts, I know there will be purists looking down on those (don't know if a lot of people got the joke with Emmet's girlfriend), but my take is that 3D-printing gives the power to make the parts that feel like they have been missing from the official LEGO lineup. For that reason, I'm not interested in cosmetic parts and try to make mostly general-purpose functional parts (even if I might also end up making some rather specific parts like the half-width gears or 4.5L half-width beams...). That's why the Torsen diffs are huge as pointed out by @efferman: those are made from general-purpose (and mostly official) parts. The only 3D-printed parts that are really required in the Torsen diffs are the helical gears (can't make a Torsen diff without them) and the bevel gear with a pinhole at the center (might be replaced by a tunrtable but more gears would be required for the change of axle orientation).
