Your comments make sense re computing power and lowering rendering settings, I have had a better day with it today, and yes it is the latest version of the CRJ. I'll take that into account when I'm using the Crj from now on, its a very well done aircraft as I use it for IFR practise and flying RNAV approaches. Thanks for your help much appreciated, I may have some more questions in the future,cheers From down under.