There is a wonderful Gibson Owner's manual from the Loar era that is online here at the cafe. DanB posted the following message this morning with the links in a message thread so I'm putting it here for reference. Take a look at it if you haven't seen it. From Dan's message: you can view it page by page at the mandolin archive or grab the pdf here: http://www.mandolinarchive.com/docum...ice_manual.pdf