So basically 2" x 3"? There’s some room right where the penetrators attach. There’s some room around the headers where the thruster wires attach. There’s also a decent amount of room on top of the Fathom-X board, but I think fitting two will come down to that heatsink and fan and how bad you want it. You can shrink the height of the Fathom-X area a little if you’re handy with a soldering iron, maybe put a 90 degree header on the leak sensor, maybe remove the RJ45 connector and solder direct, maybe remove the tether header and solder direct, stuff like that. I’d say it’s doable depending in how much effort you’re willing to put in.