It's far better to explain it with model A which is what I have done previously. The above two posts is too confusing and with vague terminology imo which can also lead to misleading. I think I see what Ashton is trying to do though, just in a different way than me. What is interesting imo is that the way it is written is to me similar style of explaining and talking that yourself, strrrng and possibly jriddy uses, even dolphin sometimes. Thank you for posting though (seriously-no sarcasm.)