Hi again

Singing in general should feel "easy" in the sense, that it feels good and that one is using the least amount of energy possible to sing the note.
But "least" doesn´t necessarily mean "little".
It might not feel "easy" to sing an advanced technical and musical phrase, but if we, at all times, can break down a phrase into the specific, physiological settings that produces it, we stand a good chance of making it "easy/easier" to sing the phrase/note.
If something doesn´t feel good/feels unstable or is proportionally difficult to sing, we have to look to the technique and make changes in our approach.
Specifically in the finetuning of the laryngeal gestures v. closed phase of cords v. air pressure etc.
It should, in a perfect world, always be possible to separate the various, technical elements of a difficult phrase (for ex.) and practice isolated on the specific technical issue(s) that causes problems for us when singing the very phrase.
So "easy" in the sense, that if say.. a high note within the phrase is tough, it´s possible for the singer to concentrate all attention to the specific note, find the right position for it (the EASIEST way, perfect "spot"/sensation, the center) to sing the note, practice it again & again (muscle memory), and ultimately put it back into the phrase.
But not "easy" in the sense that actual singing (practicing, "live"-singing, amplified/studio singing etc.) shouldn´t cost the singer something in energy and endurance.
I, for one, am just as soaked as the drummer after a late night gig.
In my opinion, a singer has to be ready to do this work.
For Neutral pick a good Neutral vowel, follow the rules of the mode and sing a single note.
Does it feel good?
Do you like the sound?
Does it feels stable?
Can you prolong it/shorten it at will?
Does it feel "easy" or can you position it in a way (lets say lose jaw or bite+twang etc. etc.) that makes you able to sing the note in an even easier manner?
If it´s easy, repeat it into the muscle memory, then sing more notes and gradually get more & more music into the singing still whilst following the rules.
So Neutral has a center like the other modes, but also more possibilities in terms of the "likes" that can sound and "feel" like a different mode/sensation.
The sound though, still hasnt got any "metal" in it, meaning that it´s still a Neutral note though the laryngeal setting in the vocal tract have altered slightly compared to a standard Neutral note that doesn´t resemble the metal sound.
And on top of that, there´s the Flageolet that singers can mistake for their Neutral.
You can read about this in the book and/or check out the research website:
http://completevocalinstitute.com/cvtre ... /research/I think you should, if possible, book a session with a CVT coach.
I think that would answer your questions in a way that would enable you to move in your singing.
Makes sense?
Best regards
Kaare