As far as I know there isn't really anything like fillet in the polygon toolset. You might look around to see if there is a plugin for that type of action. Try highend3d.com. To build a nurbs surface you use the cv curve tool, draw out the curve, edit it as you see fit, then use the commands in the surfaces menu (revolve,…
Nice Progress! Looking for more! :) you should take a look at the Hard Surface Challenge here on Polycount, there is many awesome hard surface concept! http://polycount.com/discussion/132146/week-40-the-weekly-hard-surface-challenge/p1