Started up the replacement tonight for some more testing and to cook some chicken breasts.
Startup worked perfectly and was really fast. Went for 375 degrees to do some left to right temps across the grill in 4 places. I let the grill and the probes get to temp and go for 30 minutes after that before really looking at temps. I am posting the temps from the weber app. I will use one of my controllers later and post some time line shots but since I already calibrated all 4 of these probes on my last smokefire and did a quick check of the calibration I can confirm that the temp probes were all within 1 degree of each other and a within 1 degree of a traceable thermometer. Actually 3 of the 4 were the exact same temp as the traceable thermometer.
At 375 degrees across the exact middle of the grates from left to right evenly distributing 4 probes on the 36" EX6 with the far left and far right probes being placed 3 inches from the edge and the other two probes evenly distributed between the outer probes my Left to Right spread was terrible.
View attachment 500
That is a 100+ degree difference from Left to Right. Probe 1 is far left. Probe 2 is mid left near of center and so forth........ At 375 the temperature swing is unacceptable for baking or any type of unattended grilling at this temperature . I also must point out that the ambient temperature probe was +/- 7 to 107 degrees from the calibrated grate temperatures from left to right.
I then turned the grill down to a "low and slow" temp of 225 degrees and let the grill settle down naturally to 225 degrees on the grill ambient temp.
I left all probes in the same spot and then waited 30 minutes AFTER the grill had settled to 225 degrees.
View attachment 501
As you can see the temperature swing was very good except for the hotspot the the right of center. I will correct this with an extra flavorizer bar and post my findings. I have done this before on other Weber Gassers and I know it will work.