I had the same problem with my 2.5" BQ300. After testing it and confirming the probe was good, I went ahead and tried a 4" BQ300, I haven't looked back. There will be a 10-20 degree offset t ...
I've never used a clay saucer in any of my WSM's. Typically, during the winter months I just put the pan in foiled without water. Temp easily gets into the 225-250 range and will stay all night.
Just bought my first WSM as well. Already installed the brinkmann pan and eyelets from bbqguru. I have the U4 bit but, am waiting for teltru to ship my thermometer.