Here's the thing. Floyd Rose may say that their floyds are x radius, but they rarely are. Until you put a radius gauge on the things, you'll never know for sure what it is. For a 16'' radius, you'll most likely need to shim the bridge a tad to get it to that radius. For the 12'' at the nut, you'll most likely be fine with any off-the-shelf nut. The difference between 10'' and 12'' is minimal, and Floyd's tolerances suck. Tom Anderson has no issues with stock nuts on his 12''-14'' compound radius'd necks.