I figured, it was best to construct a rough draft 6” blast gate while writing down measurements and keeping parts as templates for the next 10 or 12 blast gates I have to construct.
End result: a functional self cleaning blast gate. I do have to add stoppers before and after the body on the 1/8” hardboard (didnt add in the 1” clearance for that, on my first piece). But it does slide in and out with SOME friction still present (I did add duct tape on top of the hardboard when affixing everything).
-- Yes, my profile picture is of a Carpenter Bee! The name is derived from the Ancient Greek "wood-cutter"