LR changing default B+W mix

I'm tired of altering the default B+W mix every time I convert to B+W in Lightroom. I use pretty much the same mix every time, but do not know how to change the default mix. I'm not interested in making a preset, though. Can this be done ?

Going from memory, I don't recall a way to change the default B+W mix.

I would suggest going through the pretty minimal effort needed to create a preset, but you're not interested in that. So you may be outta luck.

Why not make a preset? Do it once and then save and apply to all images at once straight away every time. Easy.

You can turn off the 'auto b&w mix' in preferences, which would leave all of the sliders at 0, and then yes, I'd use a preset to apply your settings. That's the closest you'll get.