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Change from perforated to solid drum

The decision to change from perforated to solid drum was pretty simple.
With the change from forced air to open element, natural convection it would not be good to allow smaller chaff and other particulates to drop down into the ribbon element where it could burn and smolder.

I used 22 gauge cold rolled sheet metal to wrap the drum and secured it in several locations using SS machine screws with lock washers and nuts. The fun part was rolling the shape on the drum and keeping the edges in line with the drum. To accomplish this I would form a bit, add a couple of screws, roll some more...

Here is a before shot: