There is a plugin that does the same thing and more called TF2 Jump Mode made by
The JCS: http://forums.alliedmods.net/showthread.php?t=76080. In this plugin you can disable each function depending of your needs. This plugin doesn't have instant uber thow.
The Jump Mode plugin has too many commands. Thats is why there will be some people that will want your plugin because it is easy to manage.
And a question: Why this plugin is called Weapons Locker? The plugin doesn't lock weapons and it provides instant uber! Completly different things.