Preheat your smoker to 250°F (121°C). Use Smoke X to monitor the pit temp with its air probe. Season your ribs well with BBQ rub.
Place the ribs in your smoker, insert Pro-Series® 2.5" needle probes and connect them to your Smoke X. Cook for 2 hours, until the bark has set well.
Wrap the ribs in foil and re-insert the probes in between the bones.
Return the ribs to the cooker and increase the air temp to 275°F (135°C). Set the high-temp alarm on the meat channels of your Smoke X to 200°F (93°C).
When the alarm sounds, remove the ribs from their wrapping and give them a good coating of sauce using a silicone brush. Put them back in the smoker, put the probes back in, and set the probes' high-temp alarm for 195°F (91°C). Verify temp and tenderness using your Thermapen® ONE. When the high-temp alarms sound, remove the ribs from the smoker. Let them rest while you prepare your bread, etc.
Slice your loaves of French bread all the way through and toast their faces in some butter in a hot pan, on a griddle, or under a broiler.
Pull the bones from the ribs and lay one rack on each loaf of bread.
Sauce the ribs with more BBQ sauce, top them with sliced onion and pickles, and close the sandwich.
Slice and serve! Or, eat the whole thing yourself...if you can.