If you were able to adjust the back up right view and save it. Here is how you set your left up back view directly in the hps file. Very often it will only be one view, left or right that you cannot adjust. So if you can get one of the two adjusted then here is how you mirror the saved coordinates directly in the saved HPS file using notepad.
C:\Hitech Creations\Aces High\settings\planes\f4u1d.hps
That's the head position file you will edit in notepad. Below is the all of your view keys mapped to the 3 columns of coordinates. Just copy the mapped columns of numbers I've pasted below into notepad and save it as a text file. Then open both files next to each other and match the lines.
Look for the line that corresponds to NUM_Key 1+5 or up back left. It's mirror opposite is NUM_Key 3+5 or up back right. The three sets of numbers are mirrors with the left side starting with a negative number and the right side a positive number. Here are my lines from the f4u1d.hps file corresponding to up back left and up back right.
-0.608081,0.258881,1.186473 <-- up back left -- NUM_Key 1+5
0.666863,0.231939,1.186143 <--- up back right- NUM_Key 3+5
Below is the mapped hps file for you to copy and paste into notepad.
0.000000,0.000000,0.000000 NUM_Key 8
0.000000,0.000000,0.000000 NUM_Key 4
0.000000,0.000000,0.000000 NUM_Key 6
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000 NUM_Key 5
0.000000,0.000000,0.000000 NUM_Key 4+5
0.000000,0.000000,0.000000 NUM_Key 6+5
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000 NUM_Key 4+0
0.000000,0.000000,0.000000 NUM_Key 6+0
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000 NUM_Key 7
0.000000,0.000000,0.000000 NUM_Key 9
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000 NUM_Key 8+5
0.000000,0.000000,0.000000 NUM_Key 7+5
0.000000,0.000000,0.000000 NUM_Key 9+5
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000 NUM_Key 8+0
0.000000,0.000000,0.000000 NUM_Key 7+0
0.000000,0.000000,0.000000 NUM_Key 9+0
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000 NUM_Key 2
0.000000,0.000000,0.000000 NUM_Key 1
0.000000,0.000000,0.000000 NUM_Key 3
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000 NUM_Key 2+5
0.000000,0.000000,0.000000 NUM_Key 1+5
0.000000,0.000000,0.000000 NUM_Key 3+5
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000 NUM_Key 2+0
0.000000,0.000000,0.000000 NUM_Key 1+0
0.000000,0.000000,0.000000 NUM_Key 3+0
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000
0.000000,0.000000,0.000000