Hi!
Does that sound credible?
If so, have I therefore made a mistake by making Mahasi-noting the primary aspect of my practice for now (given that my intention is to try to develop access concentration)?
I would say yes, to both questions.
Yes, it's credible, it definitely can be done.
Access concentration can easily be developed via mahasi noting, shamata jhanas can't (apart when you are in high equanimity, where shamata jhanas tend to arise by their own).
If the goal is to get first access concentration and then jhanas, you should drop mahasi noting.
An approach that will lead there is something like just doing breath counting 1 to 10 and then coming back to 1 and repeating.
The focus point should be the sensations of the air in the nostrils (the anapana spot, as it is sometimes referred to).
Important thing is that while doing it you should not pay attention to the individual sensations, but just being interested in not allowing attention to wander and keep counting.
OK, so here "jhana practice" is probably referring to shamata, and her "mindfulness practice" is probably referring to vipassana?
That said, aren't there vipassana jhanas as well as shamata jhanasa?
Oh my.. that's gonna be long.
Ok, that's how I like to conceptualize theese differences:
Shamata practices are thoose practices that have as their only goal the development of concentration (might be jhanas, might be just breath counting, a mantra, whatever).
Jhana practices are thoose practices that have as their goal the development of mastery over jhanas; jhanas can be used both for insight and pure concentration purposes.
Mindfullness I have no clue of what it means in that context, but probably it referres to insight, but I really can't know.
Mindfullness, as I understand it, (and if someone thinks I'm wrong please let me know) is this: when something is happening, you know that it's happening; and how do you know that you are mindful? If you can name it (i.e. when you are walking you can say "Now I am walking"), then for sure there is mindfullness in relation to the fact that you are walking.
Mindfullness is present in both insight and shamata practices, and it's useful for both: in mahasi noting, you are obviously developing mindfullness; if you can count the breaths, obviously there is mindfullness of the breath there.
Now, fact is, if you develop mindfullness you will most likely end up developing both concentration and insight. I think that's the reason why in the first suttas there was not such a strong difference between concentration and insight: the Buddha said something like behave good, diligently strive in developing both mindfullness and jhanas and mindfullness while you are in the jhanas, and eventually you'll be free.
However, you can decide that you want to develop only concentration and not insight.
How do you know that you are practicing insight? The 3C helps: if you focus on the nostrils and you see every single sensation arising one after the other, you are seeing impermanence, so you are practicing insight, wich will result in the nanas progression and eventually stream entry; if you focus on the nostrils and you are not aware of the impermanence of thoose sensations (i.e. you are not seeing how every sensation change, vibrate, change it's shape and texture every moment), but your attention is still always on the top of your nose, and the breath seems more like a continuous flow going up and down, then you are developing concentration and not insight. If there is a strong sense of someone watching from outside probably you are practicing insight, since you are somehow seeing how thoose sensations are something different from you; if you feel more like you are going up and down with the breath, if you are like somehow "in it", absorbed into it's rhythm, then you are probably developing just concentration.
In order to practice jhanas and not progressing throught nanas that's the kind of way of percieving that you want to develop, and in order to do that breath counting is a very good tool.
Ok, hope that was clear...
Ps: I'm not totally sure I was totally correct and precise on everything... if someone find me wrong please correct... bye!
Pps: ah, another thing: if you are really committed to that, you might consider the idea to bring breath counting also in daily life... it really can help to improve your concentration, and it can definitely be done.