I think that I would pick a day near the winter solstice, apply both the EoT AND longitude corrections for where I live and mark the hour spots. Repeat at the summer solstice. Then you would get the dial lines just like they are on (say) a horizontal dial.
For example - the sun is shining today, and I live 3 degrees 2 seconds west of Greenwich EoT is 1 min 35 secs (dial slow) Longitude correction is 12 mins 8 seconds (dial slow) Total correction is therefore 13 mins 31 secs (dial slow) So mark the winter ends of the hour lines at 13 mins 31 secs after each hour all day. If you miss the odd one, try again tomorrow, with tomorrow's figures, the declination hardly changes at the solstices, so the spot will still be near the end of the line. Really easy if you have Bob Terwilliger and Fred Sawyer's "Diallist's Companion" programme. Mike Shaw http://homepage.ntlworld.com/jmikeshaw/ N 53º 21' 24" W 03º 01' 47" Wirral, UK.
