So our kids got us a MES for Christmas. I decided To do a brisket today, so yesterday I read, and read, and read. Wow....so many options! First I preseasoned it last night, and put my bag rubs on the (untrimmed) brisket ..approx 7#. This am...I soaked my wood chips, plugged in smoker. So far...so good. When temp reached about 230...I opened it to put in brisket, water, chips. When I closed it, temp was down to 100. (yes..a cold am in Kansas) do I need to preheat the smoker? Seemed to be a waste of time. 22nd ?... For 7 lb brisket...is it really 1.5 he/#....so 10 hrs at 225*? I didn't plan on eating at 8 pm tonight. Any advice welcome. Thanks!