The construction lumber under this 12 foot span beneath the dormer windows was not level. The left side was about 5/8" lower than the right side. I had scrap lumber of varying thicknesses that were nailed in as shims, but there were gaps where I had no lumber of an appropriate thickness. I had a spindle of old AOL Online crapware disks and some failed disk burns. The disks are about a millimeter thick and in combination with scrap wood, or stacked up, they provided a bit of support to keep the 1"x12"x12' board about as level as can be expected when using slightly irregular Menards pine lumber. Final result is only a little bit crappy and very utilitarian.
In 40 or 50 years when my son tears apart my window trim to replace the pine boards with teak or bubinga, assuming any tree species other than box elder are still extant, he will have to make sense of the plastic disks.
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