Thank you Graham.
I could try that. It would give me a bit more variety.
I was also thinking of somehow maybe adding more or changing some of the drums ie try and build up the drum patterns with each variation.
I'll have to study a few of the styles and see if I can work out how to they do it. Drums , I find the hardest to make any sense of, especially in fills. I seem to get the individual volumes all wrong , and I end up with one drum sound drowning out another. Haven't quite got it in head as to what drums should be soft, and which ones should be loud. I suppose it's something I'm going to have try and work out for myself.

Thanks again

best wishes
Rikki