Bug/exploit testing for item-based plugin

I'm working on a plugin for Bukkit that really needs some user exploit testing before I can release it.

The idea is that you get items that grant you things like "summon cow" or "open ender chest", but I need to do my best to ensure people can't dupe/exploit it.

I'd appreciate it if a few people could join and try it out, the command to get items is "/ri claim", and you should only be able to get five items out at a time.

98.161.57.7:25566