Sorry guys, but I have a quick question on tesselation of NURBS.

I have a scene trying to make a wheel alloy using a load of circular fillets and trims. When I started, the render looked awful with large gaps in between the various bits. After looking through the forum and searching the net I managed to get it down so it looked alittle bit better (the attached image) but stil not quite.

It would be great is someone could list the 'checkpoints' I should be ticking off before I render the image?

So far my I have -

'Set NURBS Tesselation Options' - Curvature Tolerance - Highest Quality / U and V divison factor 5.000

Render at production quality with Highest Quality Edge Anti-aliasing.

I also have followed the folowing settings given by mtmckinley in another post
'You'll want to play with the settings, but the settings I use is to turn Explicit Tessellation (also called Advanced Tessellation) ON. Curvature Tolerance to HIGH quality. Use Chord Hieght Ratio OFF'

Anything else..... please