DA recommends torquing the 4 prop bolts on a DA50 to 55 in-lbs. I was thinking of using a drop of "Blue Loc-Tite" on each bolt before torquing. What do you guys think? The first time I removed the prop that was torqued to spec I noticed that there was an impression in the wood face of my prop from the aluminum plate, is that normal? Also the bolts seemed easy to back off. The engine has only been run twice (about 30 ozs of gas). Do any of you add lock washers?