Thanks for the replies to my post on grand regulating. Started the job today and things are going along fine. When I pulled out the action, I came across something I have never seen before or heard about either. This piano has no pinblock, (yes I know I should have looked at this on initial inspection, but with the piano on pitch and no major problems apparent, it slipped my mind. It's hell getting old!!) The tuning pins are screwed into the plate directly. The bottom of the pins are slotted and tiny metal wedges were tapped into the bottoms to maintain tension. Has anybody seen this before and do I have to do something special before I tune it.
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