Hi I just bought a WTRP last night and have never set up a WT before. I have my Linn protractor for my 9 inch Ittok arm but I'm sure these arms are not exact length even though there both 9 inch. Can someone tell me which protractor works best and if anyone has access or can email me one or one to download of vinyl engine. How hard is initial set up or any good you tube videos to help me learn, thanks Paul