I cooked mine on a Brinkman Trailmaster Limited Edition.It's an offset smoker.
I've made several mods to it so it would cook more evenly and it makes a BIG difference.
I usually get about a 10 degree difference from end to end which is pretty good.
What kind of offset do you have?
CharGriller 6125. No mods other than home made baffle & diffuser plates. It ranges around 40 degrees from right to left, but that's not usually a problem. Smack in the middle usually runs about 250 to 270 which works for most things. I can keep it around 230 to 240 on the cool end, but Saturday I was trying Mesquite and I must have got a bad batch. The only way I could keep it burning without too much smoke was to run the intake way open. Hence the heat.
I have made good beef ribs, but not so much this time...
Don't get me wrong, everyone loved them. I just felt I could do better, especially after seeing yours!
Dan