In message <3696DD18.2F30@earthlink.net> Wolff writes: > I thought the recomendation was a 1% slope. That would be 10cm lower at > 10 meters right? That was what I started with. I found that people don't object even to 5cm, so I now set at 8cm. -- Phil Payne Phone: 0385 302803 Fax: 01536 723021 (The contents of this post will _NOT_ appear in the UK Newsletter.)