Hello Folks, Recently, I started fixing and assembling ductwork inside the wall for the hvac. Some of the ductwork was simply missing, so I had to assemble entire rectangular ductwork out of 3.25"x10"x3ft half sections rectangular stack duct, s cleats, drive cleats, rectangular head (where the end forced vented grill will be present), stack boot (connecting the upper end of the stack to the ductwork in the attic). I also acquire the proper tools: bending/folding tools, snippets, etc. The following pics depicts the assembling stages: (part of the rectangular stack connected to the stack head, stack head has a flange that could be used to screw it to the bottom plate of the wall) (with connections made out of cleats and s-cleats, it is not a rigid structure, and was wondering if that is the way it is supposed to be?) So, I was wondering if that is the right approach to fabricate these ductwork stacks. Should be cleat connections be taped with foil tape? Should the whole stack be wrapped in reflectix insulation? thks!