Hi guys - just joined, great site! I have a Pyrex brand digital probe therm. My smoker is cheap charcoal/water pan w/ precision hot/ideal/cold ambient therm. Probe warns don't use in oven over 400d or in grill. Should I keep coals on 1 side of pan opposite where I thread in the lead, or don't worry about it, or am I about to ruin this therm? As for ambient, can I drill a hole in the lid approx meat position and a dial therm like I use in my deep fryer? Any advice is appreciated, as I obviously don't know what I'm doing!