I apologise if this is a recurring theme, but at this stage of ASP development, it's the ONLY constant source of delays and frustration for me. While having the min brush size of 1 px is OK in most of the cases, having Max brush size that's 4-6 times bigger than the working area makes 90% of the size slider useless. And, as it's will be always the case with any computer art, we're working on the part of the canvas most of the time.
If people find it useful to have a brush few times bigger than the canvas, then why not to have it as an option. Say, in "more" have a switch "absolute/relative" size. When in "relative" max brush size = canvas larger side. Or to be able to set min/max for a slider, not in the brush editor.
This is even more relevant in elasticity.