Worm skin is like our most tender skin.

Wood ash is used to make lye.

A person can be burned from lime.

I am not familiar with any long term posters on any of the boards that add line. If they do I doubt it is more than a tablespoon a month to a large active bin.

IMNSHO, if you overthink the pH thing, you will cause more problems than you will solve.

Many of us add crushed egg shells

sbryce, I am glad to hear you say that. I was going to ask next, how the heck to distribute said ph-balancing-material-of-choice through my flow through bin, if I decide the PH is off.

I think I will leave it alone.
I tend to fiddle too much.

How are you going to determine if the pH is off? How are you going to determine how much of what substance you need to add to the bin to adjust the pH? How are you going to insure that the necessary chemical reaction actually takes place?

Yes, leave it alone.