I have been experimenting with steaks off the short loin on the PG 500 as well, between direct sear and reverse sear I have come up with a new favorite.
I use one of my bread cooling grates to keep some air space under the bottom of the meat and place it in the warming drawer and smoke those porterhouses for 45 minutes, turn once and go again in the smoke for another 45 minutes and then increase heat to 350* and finish 3 minutes a side on the direct zone gets me right over the 140* mark on the Thermapen where I like to pull them.
The fillet side just melts in the mouth prepared this way, although a zone 4 reverse sear wasn't far behind it I never could have envisioned beef prepared this way before you guys turned me on to that FEG.
I'm gonna need new clothes if this keeps up, "eating well" this summer would be an understatement