Open-cell foam (reticulated) was used for this project; however closed-cell foam (L 200) could also be used.

Figure 21-1

Figure 21-1: Begin with a rectangle roughly 18 inches by 10 inches.

Figure 21-2

Figure 21-2: Make a tube by gluing the two short sides together.

Figure 21-3

Figure 21-3: Divide the top of the cylinder into four sections by adding marks. Between the marks at the top of the cylinder, measure down 4–5 inches and ...

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