Solidworks inverse modeling

[maximuscr31]

I made a model for a part for a RC vehicle. I am now needing to make the other half that is basically a inverse. It is a telescoping axle. I started recreating it from scratch but then thought I would quit being stubborn and ask for help in doing it. Is there a way in Solidworks to create the opposite features so the part can interlock and slide without starting over from scratch?

Here is a link to my solidworks file. I am a complete newb to solidworks. All my previous cad training was autocad 97

https://drive.google.com/file/d/0B5yKfXm1PkuLSjF3UVUtNEsxbjQ/view?usp=sharing

 

[SolidMaster]

mirror

If I understand you correctly, you're trying to create what's called a mirror of your part. Have you tried using the mirror feature (mirror individual features or bodies)?
https://www.youtube.com/watch?v=ykO37XHiYJY