Looks real snazzy... kind of like the scope should have come with them as original equipment.

The clock hands are a good idea.

Make sure your base is very level whenever you set it up, otherwise your Alt scale could be off a little.
I assume you are using a compass to align your Azimuth scale with true North? If so, keep in mind that magnetic North and True (celestial) North don't always agree. Furthermore, magnetic North wanders around, noticeably over the course of a few years.
Here is a good NOAA site for determining what your magnetic declination is.