so i almost got my setup ready to go but just realised that i have a ducting problem. my aircooled hood is 6 inches, my exhaust holes in my grow tent is 6 inches, but my vortex is 4 inches and i cant find any ducting thats 6 inches on one end and 4 iches on the other end. hell, i cant even find 6 inch ducting. is there a way around this?