Am fairly new to the maple syrup production . I have a homemade evaporator it is made out an oil drum works well, has two pans the front one is 2ft x 1ft the back is 2ft x 3ft they are stainless steel with no baffles, was wondering if anyone could tell me what the difference would be if my back pan had those channels in it would it boil off more sap then my regular pan if so what would be the difference. Right now I can get about 10 gal an hr.