Where to Measure Temperature on a Quadrafire 7100?

I'm not a fan of temp gauges and temp readings. In my opinion , it makes a fire builder become too conservative and under fire stoves and fireplaces. Keep getting a feel for the fireplace. Load when it's down to active coals, get it robustly burning with your air control wide open. There's a timer on your fireplace so it stays on high burn for about 20 mins and then turns it down a little so you don't over fire. Look in the manual for that feature. The most efficient air setting is about 3/4 closed. After you have an initial high burn. Look for the secondary combustion under the air tubes. U can refer to previous topics on secondary combustion to get more info.

Of yeah, no to #3 & #4.
Sorry .

I put a thermometer on my 7100 so I could use it to give me a sense of how the thing heats. Nothing more. It is most useful for comforting my wife. She is the nervous sort and at times needs reassuring that the stove is not going to melt into a glowing heap of metal. She now knows she can go look at the thermometer and as long as she can see that the needle is not pegged all is good.

I chose a Condar Medallion because it is as unobtrusive as possible (black with gold markings.) Behind the fascia, I have it attached to the flue a few inches above the top of the stove. It can be seen by looking through the air outlet opening. It is very unobtrusive. I ended up having to wire use wire wrapped around the flue since the magnet was not terribly strong.

I installed my thermometer after everything was closed up. You can access the flue pipe coming out of the top of the stove by taking the fascia off. If you have forearms like Popeye you may want to find a kid with skinny arms to reach in there. Once the fascia is back on you just need to peek through blower exhaust vent to see the thermometer. Here is an image from the install manual. The red arrow points to there I have placed my thermometer.