So we started boiling concentrate this year on or 2x8, and no matter what I did for adjustments, I just couldn't find a sweet spot where the temp wouldn't rise 3 or 4 degrees in the middle of the draw, we have AOF/AUF and burn all kiln dried hardwood, split to the proper size, we average around 85 gph, full hoods and preheated, and a bubbler, stack temp holds 900-1000. I'm wondering if I need to cut down the auf and not run it so hard with concentrate?