Add an option where we can set what the probability of an item to spawn, because as it is now its too over powered since they all have the same probability and mining quarries are spawning a lot inside of the boxes.

having an option that lets me control how often that item can be chosen would be a great thing since you can nerf the loot a little and make it worth doing to get the higher tier loot.

Why complicate a plugin that is working 100% and has been for years , If you think there are too many high tier items in the loot you can reduce them in the config, personally i dont want to spend time setting probability on all the items in the config when it is working as it is.

having a probability shouldnt change how the plugin works, because if lets say the probability of all your items are set to 100 or 1 depending on how it is implemented then it should stay the same it would only affect you if you change the probability of some of the items.