QuickFunBet,
Thanks for your reply, I suspected it may have been something similar to what you wrote and your confirmation is appreciated.

Chrome Prince,
Thanks as well to you, but could you tell me if that figure of 5 is a definite cut off point? or how do you determine the cut off point? In my above fiqures I get the number 7, have I worked that out correctly as I have the mathmatical capacity of a thimble.

Cheers