Wilson Audio Sasha sound imbalance

Have you called Wilson? It’s not hard? They will help you. If you swapped the speakers and your issue moved with the speakers, one of them has an issue. A driver on its way out, a connection problem somewhere, or perhaps an issue with a crossover. If you haven’t tried to change out the resistors, try that. The experiment you tried with a mid vs tweeter and centering the image won’t work. The easiest way to test a tweeter is simply cover it with your hand standing in front of the speaker then uncover it. You will notice the difference, it will be night and day. That doesn’t mean the signal getting to the tweeter is correct though, or that the tweeter is 100%. Same goes for the mids.

Have you done anything with your source? In the troubleshooting you need to check cables, and any other connection, the problem may have nothing to do with the speakers.

thanks for the detailed posts, really appreciate it.
To answer some of the questions:
I have swapped the resistors to new ones.
My source is a turntable only, a while back I had to solder one of the tonearm channel wires but that should not have any impact as I mention the image is 20 degrees to the right in the current state, when I swap the WATT speakers the image moves 20 degrees to the left.
This tells me everything up to the speakers in the chain is working fine.
I have got my local Wilson Audio dealer to get in touch with Wilson Audio, let’s see what they come back with.