I read with great interest your situation. I also have a lumin x1. The footings are interesting
I think all the CDs should be arranged irregularly to improve diffuser capabilities. Do you have lots of sound treatment stuff in the room. I would remove it all and see what the furniture in the room is doing which is extremely important and always never really discussed.
You sit really far from the back wall which is ideal, no doubt the speakers are pulled forward.
No doubt you’re Westie offers invaluable diffuser and absorption benefits.
Don’t overthink it it’s not rocket science
Love your system