hard to say at this point unless you took a picture or what you did? If you have no picture and it maintained the higher heat then yes, do less. Also do a boil test on that thermo to see what it gives you in boiling water. That way you can gauge what you are actually getting when you use it.
A lot of times the water will prevent the ECB from maintaining an even temp, that's why a lot of the guys fill their pan with sand or a paver/ cobble and then foil it (for easy cleanup) as it helps maintain an even temperature.
The next time (especially if you have food on) if the temps climb, you can always lift a bit of that foil around the lid opening and let some more heat vent. Of course, you can't do that after you glue a gasket in place.
And please, ask as many questions if you need. their is a lot of knowledge and experience here on SMF and I'm STILL a newbie compared to most of these guys!
I will look for one of my posts were I did the minion and send you the link in this post in a few... Except I can't find a pic. I will tell you that I only do a half chimney and about that much more in the pan. It is much easier to add to the fire than it is to take away temperatures.
Hope this all helps. I have had my ECB for a long time and was inspired last summer to drag it out and start doing the mods. What I never did was show anyone a "before" pic... So here we go. Before and after!
Before... early June 2013 After...July 2013
Beauty may be in the eye of the beholder!
Edited by bobank03 - 6/11/14 at 5:02pm