The method of attaching the top slide to the cross slide on a lathe has not changed much from early designs. Originally the tailstock fixing to the lathe bed and the barrel lock was carried out with a spanner and a nut and bolt, now it is lever operated. This is convenient and avoids searching for the correct spanner etc. My proposal is to be able to move and rotate the top slide over the cross slide and lock it in position using a similar lever action.
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