The raised rails are a good idea, thanks! I will look at making that change this evening when I get home from work. Other vertical spinners were my concern too, but I am not sure what to do about that at the minute! I guess some vulnerabilities make for a more entertaining fight! Its still early days, so I have a lot to do yet. Going to use drill motors for the drive I think, but not sure on the spinner motor, that will be something I need to research.