3/4" ply ( 2* 180mm / 7" square )
4* 3/8" - 16 bolts ( 2" long )
4* 3/8" 1" diameter washer
4* 3/8"-16 wing nut
^see photos for the home depot parts
Origin
stock 1/4" cutter
double sided tape
top: cut hex into bottom ( 0.25" deep , depending on the material, may be able to be hammered into place, or could require the corners chiseled out, or dog bone cut ) cut center hold through. bottom: cut washer into top ( 0.08" deep ) it the large round guide here. cut center hold through. epoxy or CA bolts and washers in place if you plan on really cranking on them. enjoy
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