Tom wrote: I just bought your doc and have skimmed over it quickly tonight. Very impressed. The ‘errata’ and the QandA links at the end do...

In your book, you mention N-S orientation vs E-W orientation.  Is it correct that with an E-W orientation, the tracking is not as critical...

Ahmad from Kuwait wrote: Dear George, I really consider myself lucky to find your book on the internet while looking for information abou...