Tbqh, I was worried about the fractional returns with such a long draft. It's about 65" total on the diagonal.
But the draft improvement has been great. I run a mailbox mod, with a damper and lower holes drilled in the door. More and more I had been having Backdraft issues depending on how the wind was going, but my previous exhaust only stuck out about a foot above the window. Especially after adding the plate that ported my smoke more towards the left side of the top of the smoker. As I own a 2007-0910 model.
I think next I'm going to try to bring the flexible duct more in line with the house with tap-cons and brackets on the brick and see if I realize diminishing returns with adding the different shapes into the chimney exhaust. one way or the other I've got to paint them with a blended paint job on the duct instead of just on the top because that silver sticks out something horrible.
What you can't see in the pic is that the rain cap, mounts, and solid metal parts are painted to match the clay colored soffit
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