cracks

[Wallace Scherer]

Ken,

I don't know if any piano technicians have used this method, but when I
worked at a shipyard back in the 70's, the shipfitters used a type of x-ray
machine to examine weld joints in the steel plates to see if there were any
invisible cracks. I think pipefitters do the same when installing pipelines
for petroleum. I don't know how you would contact someone with such a
machine, though.

Wally Scherer
Norfolk, VA