seems so simple, but...

 From:  peter46
5400.5 In reply to 5400.4 
hi Michael,

That's great! Thank's a lot! I tried this network tool, but it didn't do anything. Now, with your curves setup, I seem to get it.
Is there any specific reason why you made it so big? (grid is very small on your file) Or that's just coincidence i presume?