Which "tweeks" are more important

Kevin, when you say do the dedicated line correctly, what do you mean? Is there anything specific you are referrring to? I am gettng ready to add 2 lines so I am very curious.

Thank you.

>>More recently the Brilliant Pebbles have further complicated the situation.<<

Try a little Windex or vinegar/hot water to restore the brilliance.

>>Shun Mook Mpingo disks have had to all be removed<<

I replaced mine with Chop Suey disks; they added a little more flavor to the music. Depends on your particular taste.

Since you seem to be into cleaning substances, I suspect that a deep breath of ammonia would give you a more heady experience.

Tbg, I understand where you're coming from.
Establishing component synergy is the first step which we all have taken when voicing our systems to our listening room. I have mixed and matched different equipment support ideas with different components as needed to reach what is for me the overall desired sound for the entire system.
But, as you discovered, when modifying the listening environment,which is what I find happens with BP's, I think if you stay within the confines of one manufacturer's repertoire of tweaks you will have the advantage of a consistent (one source) approach to getting the most benefit from basic room/soundspace tuning.
For visual unobtrusiveness, and excellent audible results, I have had wonderful results with a variety of Machina Dynamica products. Even within one company's bag of tricks it is not certain you need every item available. And, placement within the soundfield has to be experimented with.
If you email privately I would be happy to give some details of using Brilliant Pebbles accompanied by other same source ideas.
Luckily, having more than one system has enabled me to find a place for components or add-on's which do not automatically work and play well together.

Well we know that ammonia has a purpose. Pebbles on the other hand simply take up space and drain your wallet. But I suppose they serve the purpose of the designer quite well in the latter.