Doug
As you've probably figured, you should only set sag etc in long travel mode.
The short travel setting is stiffer and ramps up much more aggressively, no bottoming out this sucker!
Alternatively, if you're feeling flush you could splash out on a Romic twin tube, as an Enduro specific version is available. Being a coilover, it's about three times the weight of the Fox but is plush and well controlled, with adjustment for rebound and compression damping. I've got the Romic fitted to my Enduro and am well pleased with the end result.