I was thinking about your setup the other day and wondered how it was coming along.
You may want to remove that stove pipe thermometer from the front door. One, it looks like you may be covering one of the secondary air openings, and two, the door is not a very good spot to measure temp, as it stays relatively cool and three, those things are not very accurate anyway!
Pickup an internal probe type of gauge so you are actually measuring the INTERNAL stack temp on your flue. You will find out the external surface temp of your flue is going to be pretty low.
Ya I’m not really using the temp gauge on the door it was a extra and I just put it there. So I had my first fire yesterday and tried it out. Works great I think it will work better when it’s gets colder out. One thing that I did see was stack temp. Was not very high I hit it with a lazer thermometer and highest reading I got was 195* . Is that normal?