Re: Qualities of a good plumb bob
My buddy owns an elevator company, and won't use anything *but* a plumb bob....his problem arose from trying to get it to stabilize on a 200' + line....we're talking a whole day in some cases. Anyway.... Years ago his dad figured out that the shaft hole was the same dia as a pail they had in the shop.... And had a cool idea.
at the bottom of the shaft they put that pail in *about* the right place, then fill it with mineral oil. They drop the bob into the pail and it steadies immediately. They then move the pail so the bob-line is centred, then trace around the pail.
Useful information? Probably not....but a cool example of making it work
I dream of a better world, one where chickens can cross roads without having their motives questioned.