I would like to add another suggestion to this , to be able to open other player's enderchest even if they are offline, not sure if it will be possible to you tho. Another thing that I don't know why is it there and I don't like it that much, is the character limit for the enderchest title (32 including color codes currently). I mean, CHEST type GUIs don't have any cap for the characters on the title, and I don't see any reason of putting on your plugin a limit to the characters on the title... I was setting a title that even fits perfectly into it, but got cutted because of its color/format codes amount. If someone sets a really long title to it, there is no need to advice them, for logic reasons I'm guessing that he won't like that and he will make it shorter.