You are doing *fine* if you can't adjust the coax attached signal meter below halfway. This means you are dead on and have done an excellent job of aligning your dish.
Good work!
Notes: My coax attached signal meter has an additional level adjustment on the back. I have never fiddled with this. I figure if the meter is peaked, I am doing pretty good on my
aiming.
Also I go by the needle reading, not the sound.
Then if you are using a prime focus dish, you can make further elevation adjustments or check your elevation by moving the dish to where you just begin to get the satellite.
For example you are aiming your dish at a satellite and can get readings inside of this circle you are pointing the dish at ----> O.
So say you are in the center of the circle (left/right) and the meter is peaked and will not go below halfway. You can move your dish a few clicks left or a few clicks right and be more toward the edge of that circle.
Now you will be getting a weaker signal from the sat and can adjust the signal meter to halfway. And you can then press up on the dish with your hand (lightly) and see if you get a stronger signal. Or press down on the dish and see if you get a stronger signal. If the signal gets worse up or down, then your elevation adjustment is perfect (in center up/down).
Note that it is very tricky trying the above with an offset dish. When you press up on the dish, you may actually be making the dish move left or right instead of moving straight up or down. So it is possible you are say moving the dish closer to the center of the circle and this would give you a stronger signal. So be sure, when pressing with your hand to check the elevation, that you are in fact making the dish move upwards or downwards.
Anyway it sounds like you have done a fine job adjusting your dish. And as they say... "If it works, don't fix it!"