As title suggests: I think it makes more sense that copy/paste can add a module inventory request when pasting into a existing machine. Otherwise we have to remove a whole bunch of machines together and paste the machine with module slots again.

Also:

I hope upgrade planner can add a support to ...

Hi,

I suggest add a new API is LuaPlayer like this:
```
LuaPlayer.get_cursor_surface_location() -> Position
```
Or:

add a new surface_position parameter to user's custom input event that involves cursor clicking.

This makes a lot of operations possible, such as let player go to x,y location, or ...

Belt Router

This QoL mod helps you path find belt routes from starting point (shift + right click) to ending point (shift + left click/shift + ctrl + left click) and creates a trail of belt ghosts.

Mod link

https://mods.factorio.com/mod/BeltRouter

Key bindings

* "shift + right click" on ...