Hi,The attic has been a livable bedroom when I bought the house what I wanted to do to create the illusion of more space was to expose the historic rafters and make a knee wall (HVAC on left side) and run sheet rock between them and keep the beams exposed and also vault the ceiling.There are 2 gable vents at either of the roof and no soffit vents just blown in insulation. I'm planning to put blocks in to keep 1 inch between the roof deck and the foam board for air flow then put in foam board insulation on top before sheetrock.Since there are going to be two slim recessed lighting going in there will be a flat space at the topm..... so to vent can I run a PVC pipe end to end with holes or move the vents up?Are they necessary if I add soffit vents?PS. I'm only vaulting half the ceiling so the other vent is there but I know I need intake and outtake.Do they sell mini vents at HD that go up higher?Thanks!Here's Google Photos Album https://photos.app.goo.gl/k8R3YcEvcwtoyKyt9