If you go to the Pitt Boss official website and go to the recipes section and will be a drop down , go to Style - then select Smoke - there will be the exact recipe you are looking for !!! "The Georgia BBQ Brisket Sandwich" it calls for a 1-3 lb. Brisket Flat like yours and only takes about 3 hours - 190 internal to 205 degrees !!!
Go to the Pitt Boss official web site and go to recipes section - there will be a drop down and select Smoke and look for the Georgia Brisket Sandwich recipe !!! It calls for the Brisket Flat 1-3 Lbs. 190-205 internal temp. about 3 hours cooking time !!! You can also use some white grape juice in your drip pan , or apple juice .