Just installed a support box in a cramped, dusty, mouse turd space in the attic. The support box, double insulated pipe and flashing/storm collar was removed from an elderly couples home. The contractor removed the support box while I removed the insulated pipe so I wasn't 100% sure what the assembly looked like. After reviewing a few web sites showing the different support box installs I'm hoping I've got the assembly correct before I completely secure it to the frame and take the next step to install the rest of the pipe. I'm working with used parts but still in good condition with little use. Yes I had to cut the 2x6 ceiling joist and re-frame since it's the only route the stove and pipe can best be located. So, curious to know if everything looks right. It's my first install.