If you want a piano to stay in place then get a large eye bolt, chain, pad locks and epoxy. Drill a hole in the wall, into solid material if you can and slather the bolt and hole with epoxy and screw the bolt into the wall. Put the piano in place and chain it to the eye bolt but cut the chain short enough that there is not enough room to use the mass of the piano to yank the bolt out of the wall. It will stay there. Give a set of keys to the administration and keep another set in a safe (and remembered) place. I did not like chasing peripatetic pianos to ge them beck into the class rooms where they were needed. Newton
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