Hello to all, this is my first year sugaring with a real evaporator and ive read a lot of the threads about using copper coiled around the stack to pre heat the sap. I purchased a new 2x4 Next Generation evaporater and it came with the little pre heater box that sits on top of the pan in the rear. My question is this, is there a bennefit to running the coiled copper in addition to the pre heater box or dont i really even need it?