I don't actually remove the tops and bottoms- I use a pair of small tinsnips to enlarge the top hole into a large diamond, then use a nail punch to start the bottom and do likewise...when the tube is assembled with high-temp gasket sealer it's essentially going to be 'ribbed' on the inside. With my ten hour shifts and two-way commutes I allocate only a half hour per night, giving me an easy half-dozen cans per night.
Assembling and painting the case, creating an SIP (Foam-cored double plywood board) window block etc will have to be done outdoors and will need to be done after the Holidays.
As far as mounting the Bubble wrap, I did the lazy thing-cut to fit, dampened each panel and slapped it on. I'll need to remove them with a butter knife if I ever need to replace any though...
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