toolbox

Hi everyone, as you know sometime we need an especial standard element like a gear with modul 2 and teeth 24 and maybe a hole and some other editions, so when we bring one gear for example and save as a copy by another name and edit it and bring it again to the assembly , that is okay. but next time when you open the assembly the edited part is changed and you have to remove it and insert it one more time, although i delete all the equation of the feature tree but it still remains so.

Any idea would be heartily appreciated.

Mohsen