It just all seems odd because even you saying that your mirror is slightly out of center mine is too and i can see it quite visibly and its not a issue. if i was around your area ide be saying to you
lets catch up because i love trying to solve issues.
Have you watched the cats eye video on how they use their stuff? if not cruise on over and have a look. the other thing that you will need is a focused beam of light to shine on the hot spot because its too hard to decern P1, P2 and P3 in my 4.7 your 3.8 would be even worse.