John, It may not always be necessary to prep a block before driving pins...but you have no gauranty that your pins will not be jumpy...I have never had a jumpy block when prepping with Varnish. It is not expensive and is quick and easy. Hope this helps, try it you may find it is worth while. Ed Tomlinson Tomlinson Tuning & Repair In a message dated 97-04-16 14:27:31 EDT, you write: << Is it really necessary to "condition" a used or new pinblock with some type of "conditioner/pin-driving-fluid" before driving in new tuning pins? Regards, John Piesik, RPT >>
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