Solved by partially changing the concept. To whom it may concern: You can actually call clean_cursor and cursor_stack.set_stack from on_put_item. Process for me:

In on_put_item:

1. Note down what tool was used and set a flag that it's in use
2. Clean the cursor
3. Set the cursor to the item you'd ...

Hi!

I've been creating a mod to show direction indicators on belt placement since I was constantly screwing up the placement. For this, I created a "belt placer" item that is in the transport_belt fast_replaceable_group. On being built, it is replaced with a belt of the appropriate type and ...