Is it possible for the center image to drift from lp to lp?

Astro58go, if you are handy with a soldering iron, get a small box and and Alps RK40 (Black Beauty) balance pot.  These are the best pots ever made (IMHO), and are still readily available on eBay.  Put a set of input and output jacks on the box and use the box between your preamp and power amp, where it will make the least impact on sound quality.  There is a detent on the pot to know when you have equal gain on both sides.  You only need to make a small adjustment to center the image of any LP.  Total investment, including the pot, is about $150.00 !

dcbingaman, Thank you for the info. I do appreciate the alternative to an equipment change.

stringreen, I hear where you're coming from. I Do feel I have some more "truth" to find within my room. Thanks!

FWIW,  My next , (and maybe last upgrade, except for acoustical treatments) may be going from my EAR 834P, MC/MM & Bob's Cinemag to the  K&K Maxxed Out w/ volume, since I have a vinyl only set-up.

I appreciated all of the responses.

When I first posted, I had recently received a pair of Usher Tiny Dancer Mini Ones. They were advertised as having 150 hours on them. I had put around 60 more hours before I posted.

What I feel to have been the issue for my post, is now gone. I believe it was the break-in period had not been substantial enough. Then, it seemed to take longer for one speaker than the other.

These speakers with the diamond tweeter, are so revealing (they replaced my BE-718s) that any tiny adjustment is noticed.