This is my version of a UDS. Also with this being my 1st one I have some newbie ?'s my free barrel Drilling with uni-bit 1st burn out made me an ash pan and charcoal bucket ash pan painted welded up a 6" tall lid ash pan/charcoal bucket inside I have 2 racks inside done painting added a nipple to allow therm. access. Mistake?? starting to season This is my shelve I added.(notice the outside temp this is before I started seasoning) notice diff.in temps (1/2 hour or so into seasoning) so here are a few of my questions. I checked my external therm. (it has the typ. 2" probe) and it is accurate. As you can see in 1st therm. pic its in the low 50's outside. when I was well into my trial run (I had my digital therm. in the center of my top rack). As you can see I'm getting approx.50 Degrees different. Is this typical? I'm also having problems holding my temps down. I've closed both 3/4 nipples when I hit 200 degrees.(which was almost immediate) now I only have my 3/4 ball valve open maybe 1/8" but still running @ 290 can't seem to lower the temp. Was adding the 1/4 nipple for therm access a mistake ? Is it letting to much air in that I can't control? Thanks for looking at my Q-View .