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Earlier, Pete also wrote, off-list:- ********** In that case I would suggest it was a balance-bob at surface. 192 yards isn't really deep enough to have a balance bob at depth. Without seeing a profile of the shaft I can't comment on it being an angle-bob. Pete ********** Regards, Andy If you need to leave the list, send the following message to [log in to unmask] - leave mining-history ---------