Step Three - Airwell/Inner Core
Now that the base is done, start on the core.
Grab the tin snips to cut the appropriate size hardware cloth and window screen.
Wrap cloth and window screen tightly around the 4" endcap, have the 4" duct clamp ready.
Repeat with the base and stitch it together if there's a gap.
Grab the pantyhose and scissors. Cut off a leg and roll it onto the core. It might be helpful to tape off the screen's edge at the endcap to avoid snags before applying the pantyhose.
The core is now finished.
Take a break, smoke a bowl, and get some sleep.