Autoreply, Thanks again, I'm looking at that now. I will ask Jan what he uses for CDo to get his predicted L/D.
Fly2kads, So vey true about the program, however it is well worth the asking price, I've had all sorts of fun playing with this. At the very least it gives a guide even with a WAG on L/D. It's good to get feed-back as to the accuracy of the program, I'm very impressed with it overall.
Thanks for all the comments - it all helps.