When loading a save, remove any monorails that go to the same station as another monorail. This should never have been possible, but for a bug in previous versions (which should now be fixed). Apologies if this deletes a monorail you were using, but it was causing issues with trains colliding and it seems some players were under the impression it was supported, when it shouldn't have been allowed in the first place.
Make blast site explosives hole even bigger and angle down slightly.
Improve robustness of how the inventory keeps track of parts.