IORRA,
Very nice explanation indeed. Just the sort of thing needed for the "technical" response required from the original poster. My very simplistic post was, as stated, a 'fill-in' until a more qualified technocrat came along.
P.S. Thanks for not shooting down my simplistic 'fill-in' too hard, seems my flak jacket wasn't needed
airfranz, send me a PM as the time gets nearer, sounds good to me, but the rostering demons may have their say! I look forward to learning something
Regards,
Old Smokey