This mod adds a belt brush based on the one from PickerBeltTools. Currently there isn't support for underground belts yet but that is coming very soon (literally the next thing I'm going to be working on now that balancers are supported).

How do I use this mod?

There are keybindings for growing/shrinking the brush (which automatically creates a brush when you use them while holding a belt), and for cycling through the straight line and the two corner types.
You can find the keybindings in the controls section. Defaults are:
- Grow brush: CTRL + SHIFT + EQUALS
- Shrink brush: CTRL + SHIFT + MINUS
- Cycle brush type: CTRL + R and CTRL + SHIFT + R
- Cycle balancers: CTRL + B and CTRL + SHIFT + B

Does this work for undergrounds?

Not yet, but that is the next thing I have planned.

Does this make balancers like the picker mod did?

Yes (newly implemented)!

If you crash or have any other issue, I'd super appreciate it if you open an issue on the github repo, that helps me make this work (make sure that you are up to date before doing so as I might've fixed your issue otherwise).