Correct, Rick now has 6mm outputs and MIP also sells hubs that will bolt into your standard driveshafts. I am using modified Slayer parts but there are easier and more available parts that you can grab that don't require modification like those did.
I have a full list of parts on my site: Building a Bulletproof Transmission | Harley Designs
I have a full list of parts on my site: Building a Bulletproof Transmission | Harley Designs