What yo-yo accessories can you DIY? And how?
You can make some cool counterweights:
You can make counterweights yourself, just by finding any die or bouncy ball and drilling a hole through it. You can also make yoyo string yourself.
http://www.youtube.com/watch?v=82pigIyESOg
Counterweights, string, and pads. Thats about it.
Don’t forget shims 
Take some piece of thick paper or thin cardboard that seems thick enough, hole punch it, roll up some sand paper, sand the hole until its the correct size, then cut out the hole from the paper and cut it into a nice circle.
- pogs
Does a case count? Cases are fun, easy, and useful ^^
i made my case out of an old macbook case and some foam, it works really really good well 
and make sure you have a small tomato paste can and sharpen the edges. it makes the job so much easier when the can is sharp
use a credit card for shims
whats that?
caps i belive
yeah I think that’s what he means… The caps that come out of most “cheap” Duncan yoyos (and maybey others idk) look simaler to pogs. A fad a couple of years ago.