Hello, currently the Heavy Excavator plugin doesn't integrate with Excavator Lock. Given that the excavator lock plugin looks to rely on a user to start the excavator for that message, it wouldn't work well with Heavy Excavator as the excavator is started by the server for the event and not a player. I'm not familiar with Excavator Lock but in just looking it over, I don't see a great way for them to play nicely w/o modifications to both Excavator Lock and Heavy Excavator.
As far as the multiplier, I'm assuming you are referring to resource output? That may be something I add in a future update.