Just to chuck in my two cents worth, I build Robert Fripps (King Crimson etc) signature guitars and the only trem system he will use is the Kahler.. 2200 for preference but that's mainly just because that is what he saw first! He's a difficult man to please, as you would be if you'd been playing pro for 40 odd years, and he really knows his stuff! Here's a link to pics of his Slimline Signature Model.. oh, on the neck angle thing, I think it works both ways but have ended up recessing a few in flat top guitars, just to get the right sort of feel for the customer really..