Lock Brush Texture Size

There's already at least two proposals about locking texture brush size. Well, it would be really convenient if you could lock its textures (both alpha and color) with it and separately. And by convenient I mean almost necessary for anyone using textures for either purpose.

Every time you zoom just see what you're doing, you have to eyeball scale each texture you're using to try to get it to match what you've already done. It would be a lot easier to use if it worked the other way around, and it scaled by default and you only scaled it by hand when you wanted it to be different.