here's what i think could work if you have the equipment you could mill an alley key fitting in the end of the large bolt so you can tighten it from the bottom, then lock it off with the smaller bolt at the top
@Stu_F started
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here's what i think could work
if you have the equipment you could mill an alley key fitting in the end of the large bolt so you can tighten it from the bottom, then lock it off with the smaller bolt at the top