Fire bricks makes all the difference. I setup the firebox the same way I always did and the next thing I knew, the smoke box was reading 350 degrees. HELLOW!!!
It use to be a struggle to keep the smoke box a 225 degrees. Now 250 is easy.
Also found that the ash tray can be retasked into the bottom of the smoke box. Import for me because I do not use the bowl. I perferr to mop my ribs once an hour instead.
Finally, any update on the silicon door seal?