Purchased crate of KNEX

I recently purchased a large crate of Knex from a donation center with no instructions.  Is there an easy way to tell what kits I may have?   I have sorted all the pieces and I noticed some of the same color rods are shorter than others.  Are these counterfeit pieces or is there a reason for shorter pieces?  I can't wait to build my first ball machine.
Thanks,
Chris 

Can you post some pictures of these K'NEX? I might be able to help if I could see them.

cmu3rd (author)  The Knex Inventor9 days ago

Thanks. First pic is the different size rods. Second is the motors, balls and some short micro chain and regular chain. The third is an overall pic with some orange tubing.

IMG_3619.JPGIMG_3620.JPGIMG_3621.JPG