Bought an inclinometer (Home Depot $10). Had an old wall clock that I removed the hands from for pointers.
The Altitude Degree was affixed with dbl-stick tape. I siliconed the clock hand between 2 thin washers, & installed it first, against the scope, on the "spring" bolt.
Then, with the inclinometer, I adjusted the clock-hand pointer, until they agreed, all thru the scale.
On the base, again I used dbl-stick tape to affix degree circle. I drilled a small hole in the side of the lower base, using a stainless steel screw, mounted the other clock hand (hour). I then bent it to clear edge of other base & forward to point to scale. I think the set-up looks great; I don't need the inclinometer now that the pointer has been coordinated. Of course, now a front has moved in with total overcast, so I cannot try out the new "Go-To" $12 system!