Ran the GS at 350 for 35 minutes. It stayed at the set number on the pit readout and the grill temp on the maverick was from 342 to 353. Then lowered the temp to 220 and closed the upper butterfly valve on the Godke to mimic smoking at low slow. Actual temp at the middle of grates ran between 219 and 225 so that was wonderful as well.
Please Note: I have previously accurized my PID set/actual temps on another thread and essentially the downdraft and exhaust tip have not altered the results to any degree. It was nice to direct the smoke away from the work area when I was in and out of the pit. Also, tonight I made burgers on GrillGrates at 450* with no observable changes noted.
I like the exhaust tip and have one extra for sale at cost plus cheapest shipping--should be around $15 total. You can private email me for the particulars.