On to the shroud. Found this chunk of 16ga. SS sheet metal I had kicking around that was tailor made for this job. Stuff was pretty hard though. Went through about 5 jigsaw blades to cut this 80" circumference. Added 1 1/2" to the fan circumference for 3/4" blade to shroud clearance. Found some 1" angle brackets I had on hand and had-at-it with some 3/16" rivets. Yee-ha!