*Gosh, dang dibbity dag nabbit* - sorry Pete. That first night it was only off max 1.5 degrees. It was w/ the longer nights that I saw how bad it could get at times. Now that I think about it, I was limited to a smaller part of the sky. Maybe your right about the direction of error and it’s not the 'moving around' that causes the errors as I thought it might be. I've got to check that out some more myself. Hope you work out the kinks.