Acoustic panels on ceiling

thyname, thanks for the link.

mijostyn thank you for the explanation.

I can see the obvious physical problem of holding and moving the mirrors while sitting in the listening position.  It does seem that having a ladder and friend (or wife/significant other), LOL, to hold the mirror would be pretty essential.  

The mirror technique will work if you can MacGyver a way to hold it and move it.  If it were me, I'd start approximately half way between ears and front plane of speakers, and then explore a little fore and aft.

…..you say you’ve been reading conflicting info. How are the answers on this thread any different from the rest?  Why wouldn't you be satisfied with whatever GIK tells you?  Just curious.

I would be very satisfied with GIK info if I were able to figure out those first reflection points myself. Totally my fault