Thanks everyone for your comments, every little bit helps.
I’m going to install the top end of my cooler tubes on an angle to match the hopper lid. I figure the gas is being deflected in that direction why have it change directions again and create turbulence. Again, every little bit helps. They will be 3" wide, 2" deep and 16" from tip to tip. I’m working on the area, will post later.
Pepe
OK, it’s later. The area of a trapezoid is (base 1 + base 2)/2 x height
The area per tube is approx. 1.25 sq ft. Adding 4 tubes will add 6 sq ft. or approx 37% increase in surface area. 6 tubes approx 47 % increase. More than likely I’ll use 4 tubes.
EDIT I erred, 4 tubes is only 5 sq ft or approx 31.25 % increase.
The initial area of my monorator is 16 sq ft.

