A Cinestill immersion heater/circulator (aka glorified sous-vide cooker). My old Gourmia died on me while I was using it the other day, and having my developer at a consistent 140 degrees F for Pt/Pd printing is a critical element of my process. Oh, and a pair (don't ask) of Majestic geared heads for my big tripods to use with my bigger large format cameras.