How to set stroke's thickness?

When I choose a brush such as “pencil stycle”, I want to keep its effect but need increase its thickness. But brush’s setting is too complicate to achive effect directly. Who can give me some sugesstion?

I have a pencil in my “Dieterle” brush pack that tries to do this, but you need an alpha or git version of mypaint.

Basically I added a feedback loop for the base brush radius. So when you increase the brush size you can also tweak any other settings as necessary to maintain the brush behavior. It’s by no means a perfect fix but it helps.

Here’s a YouTube showing how to use it