Dan,

I had been contacted with that gentleman years ago , but I had lost the address. Thank you reminding that one of the best site on web.
I want to ask , what does it mean that final negative coma analysis final result from one example lens. Does it mean there is still a error , or does it mean there is a excellence ?
I cant wait , I will open a thread. And how do we need to comment on spot diagrams ?

Umut