So I have been working w/ a few vmax 600, 750, and 800 primarys the last few days. Does anyone know why the 750 primarys use two different bolts that holds cover on? One of the bolt uses a washer and the other one does not. I thought it may just be mine but after tearing into three it appears to be like that from the factory? Also do I need to use blue lock tight when installing rollers and weights? It does not look like it was used from factory, but looks like when someone did work on them they used it? I know it wont hurt anything just curious on everyones thoughts???