Hi Yogani and thank you so much for your answer.
I've been experiencing physical activity in my neck and jaw pretty often durind DM and especially during samyama, and it is something I'm used to. This isn't anything new in my practices and I don't even consider it "discomfort" or something to be worried with.
The recent introduction of kechari during SBP definitely stimulates some new energy, and this causes again activity in my throat/jaw, as was often the case in the past anyway.
What is interesting and new for me now is that when I am in kechari, all the mess in my jaw stops immediately, and I don't need to flex and strech and open my mouth even during the rather huge energy outpourings during samyama.
As soon as I release kechari, all the physical movements are back. It's really like a switch...
So, I'm not actually concerned with overload at this point. I've been through energetically much wilder periods, for instance when trying siddhasana. Rather I'm asking myself if I should better keep testing kechari only during SBP and tolerate patiently all the jaw and body activity during DM and samyama, or to stay in kechari the entire sit, because it feels right and seems to dissolve all the physical symptoms instantly.
I tried to describe my whole kechari experience also in
one of the above posts. Maybe it helps a little to clarify things.
Roman