Yep, PGF can be a pain which is why I don't post there any more (I sdid throw the 60 NR final pics up just to tease them!), but read everything I can when I need to. The important thing about angle is the bridge to nut measurement I think. I actually do as the PGF guy recommends, I get all of my parts, measure them and then do a life sized drawing on some long sheets of paper I have just for this purpose. Once you do that, it all really does make sense. You just need to know the heights of ALL of your components.