In my old shack we used a 6x8 piece of square tube(steel) 1/4" walls for our chimney (2x6 evaporator, forced draft). Stack was about 16ft long, in my new shack I had an opportunity for a new stack. I came across a 20' piece of schedule 10S Stainless pipe 10" Diameter. I have about 14 feet from my floor to where the stack will penetrate the metal roof, some of that will be taken up by the height of the evaporator(32"), and some will be taken up with the height of the stack base(32"), the rest will be one solid piece of pipe. If i was using natural draft the rule of thumb is double the length of the evaporator for stack height, but in order to get out through the roof it has to be taller than that. Originally i thought i would just put the whole thing up but that puts me at close to 7 feet of stack above my roof. I started to think maybe I should trim it down, take maybe 4 or 5 feet off the top so the wind won't catch it so bad, any thoughts on that would be appreciated. That gets me to my next request for some input, the pipe weights about 18.7 lbs a foot...so taking off a few feet will help to manage it. I have two 3/16 cables run on pullies that i plan to use to suspend the stack over the base, any thoughts on that? here is a link to the bracket I fabricated to support the chimney https://photos.app.goo.gl/S56RkahyzRcyiAVU6

I put a lot of thought into this, but i don't want to miss anything, all input welcome