Saturn from the 12/4/2012

Had a few nights of clear viewing so had a go at imaging Saturn, happy with the result but hoping for maybe a bit better when the planet is at opposition tonight if we get a clear night.
Would be very interested with your thoughts on this image and how I could improve it.

Saturn image was captured with the cpc 8 inch sct working at f20 with the Neximage webcam,2400 frames with 1100 stacked rgb align and wavelets with Registax 6.1.

Many thanks.