Think your speakers are positioned correctly?

I check my speaker position every couple of months give or take a little. I measure distance from front of speakers to listening position, toe in angle, and the angle of height. I bought one of those laser flashlights for around 5 dollars so you can get pinpoint accuracy. I have found that whenever I check position a minor adjustment is always needed. Overtime a year or two I could see how a speaker could get out of the sweetspot. Good Luck.

A 1/4 of an inch is a huge problem. When you factor
In a
Distance of the usual 8 to 12 feet from
A
Speaker the typical listening distance the effect is very disturbing. I try to set my speakers up
Within a 16 th to a 32 nd of an inch. 1/4 of an inch is way to far out.

It took me almost three years to get my speakers dialed in just right. I would listen for a while, make adjustments and listen a while again. I too make 1/8 to 1/4 inch adjustments. Speakers seem to move. I don't know if someone bumps them or what happens, but I remember one time things didn't seem right. I got out the tape measure and one speaker was out of position by nearly an inch.
The most obvious tell for me is the imaging and sound stage. Images seem a bit out of focus if one or both speakers are not dialed in right and the sound stage can seem compressed. Something else also seems off with the sound to me if one speaker is out of position, but I don't know how to describe it. I made the final toe-in adjustments by ear and then measured. Both speakers ended up within 1/4 inch.

What timing to read this thread.
I spent last night completing my speaker setup. It has taken many months to come to this final config. I measure with a tape measure, but also sketch the layout in a book with the complete measurements. I number (and re-number if required) the layouts per the preference, so that I can go back to them. Last night was a revelation when the toe-in w.r.t listening position as well as the room treatments took the sound to a totally higher levels!!