Well, I'm no expert on C-band Prime Focus dishes and actuators,
but I would think that with a first install, checking the relevant angles with an inlinometer first, would be far easier than checking reception at multiple dish angles.
I would check reception at different angles only AFTER I had checked all mount and dish angles.
That way you can compensate for irregularities in the dish construction, that would urge you to use other angles than the calculated angles.
But if all's well with the dish construction, your reception might be directly spot on.
But, I'm no expert on this..... I'm just imagining what would be the easiest way.
And if people want to do it another way: be my guest!
Greetz,
A33