Can’t see me changing from shorty/dhr2, some other stuff I like doesn’t seem to work so well for 29er. And a pair of minions on the fatbike. TBH my riding doesn’t really require a lot of pedalling-through-slop so I can get away with a less muddy rear. (I do plenty of mud, it’s just mostly got gradient)
Hilbilly grid is available online, just Spesh don’t seem to do a viable winter rear tyre
Depends what you want but I always loved the Butcher as a rear, in 26- rolls respectably if not exactly fast, good grip and slides better than anything else I’ve used when it goes, made me look like a better rider. It lacks big deep pedalling power though.