Fransisco, If you want to learn more, seek out a natural sounding system in Europe, then sit and listen to it. If you want to learn why it sounds natural, talk to the owner, study the gear and the set up. Listening is the key. Take your own music and arrive with an open mind. If it sounds natural to you, it's sound will be based on your memory of the way acoustic music in real space sounds. This should be very easy to grasp.
There is one horn system I would like to listen in Europe - and it is from a WBF member. However, it has the opposite approach of David practice - expertly done DIY of current components, mix of known brands, exotic cables. My best music is digital, fortunately not a problem in this case.
If you want to learn still more, read some of the threads on WBF that welcome an open discussion about Natural Sound. There is nothing special about such a wheel or above any ability to discuss it. No one is keeping the discussion from you. You had private discussions with David about your internal searching with your own system. It seems you continue to search. David made suggestions and offered advice. There is nothing special or above the discussion there. You either welcome the discussion with an open mind or you reject it outright. It is your prerogative to do as you please and to follow your own preference.
As far as I see them the WBF discussions on Natural Sound were never really open - interesting questions are systematically ignored. This thread is on
What does the source sound like... , I posted on it. I will respect your wish to avoid what I and others consider interesting subjects on your system thread, that would be a natural workbench for them.
I feel honored you debate my system - it does not deserve it, IMHO.
I try to approach audio questions in a straightforward and direct way, no taboos. Sorry if it consternates you.
BTW, I feel very happy you now write "Natural Sound" in capitals - I fully agree with your decision.