A project I needed done for tanks and ships was making a better aiming chip, with the help of several people it has been completed and is available for all to use. Links below:
Pastebin - http://pastebin.com/pUB2ui1m
If you can not figure out how to copy and paste from there this is the e2 in text document form, Put it in your gmod/data/expression2 folder.
https://dl.dropboxusercontent.com/u/3...
Wiremod on GitHub:
https://github.com/wiremod/wire