Hold on a second. If you aren't smoking something that requires tight temp control such as sausage or some salmon recipes, tight temp controls aren't a necessity. Certainly, pork bellies, pork butts, beef and chicken aren't adversely effected by the temp swinging up and down. Also, the temp swings lessen more and more as the load in the tower comes up to temperature. Take your remote thermometer and check your house oven. Big temp swings in there too.
I own the Auber dual probe plug and play PID for the BDS. It's still in the box. Never been hooked up because I haven't started on sausage making yet.
Let me suggest that all new owners spend more time getting to know their Bradley instead of immediately complaining about it before you really know how to use it.