Thanks for that info Mill, I'll compare the results of both using the same inputs and see where i went wrong.
Polar alignment was on the top of the list when i went through what could be wrong David. I had another mount that i knew was very close to correct alignment set up next to the platform, so it wouldn't have been far off. The issue was tracking along a arc that was too 'flat'.
Anyhow, will give this other program Mill pointed to and see what numbers it gives me, and I'll be sure to make a cardboard mock up of these figures first!!
Thanks guy's
Geo
