'Small hand sander

(or Vibrator
[ask the S.O.,You will be Amazed what's in her tool box.
'Nothing over 5 Amps A.C.] )

'Applied to the offending Key (Or maybe even the cover...Just be CAREFUL with
the Wood!)

One member here clamped the key head into the "Clamp" portion of a Hand Sander and managed to turn the Key and get the "Bad" tumbler out.

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'84 300SD sold
124.128