Well, I just made an account. I really like this site. This is a little thing me and my friend made up. I didn’t see anything around here about custom caps so here’s a little tutorial.
First of all find the size of your cap. Also here’s a link to some various cap sizes: Dot Ventures.
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Then make a image of your design. Remember, parts are going to be cut off, but it will still look good. Make the size a little bit bigger than the actual cap. One thing to note is that printers might make it a bit bigger or smaller. Don’t worry about it. You’re going to cut it with your cap as a template.
http://img268.imageshack.us/img268/7690/photoshopooy.png
I’m using Photoshop, but anything except Paint will pretty much work. Try Paint.Net, it’s advanced and free!
After that, you need to print it. Using photo paper will make it look a little glossy(By the way, the X-ConVict uses some HP photo paper. Wink My friend, Alex, and I found that out). If not, just use printer paper. It’ll still look good.
http://img268.imageshack.us/img268/5682/img0526k.jpg
Then you’re going to want to cut it now. Use an Exacto knife to cut it and use your cap as a template (you shouldn’t be doing this if you can’t think of a substitute for your precious cap). Be as precise as you can!
http://img8.imageshack.us/img8/5792/img0529wgi.jpg
http://img268.imageshack.us/img268/7120/img0528wqd.jpg
After that you’re going to want to cut a piece of thin plastic. Again, use your cap as a template. Mark your plastic with a little sharpie. Cut with scissors or an Exacto knife, whatever is comfortable.
http://img268.imageshack.us/img268/931/img0530erm.jpg
You’re almost done. Now put in the photo first and then just pop the plastic in after it.
http://img8.imageshack.us/img8/5254/img0525j.jpg
You’re done!
It’s going to take a few tries to get a good plastic cap and really thin plastic works. I thought it would be too thin but it wasn’t.
ALSO, I know there are quite a few grammer mistakes, I would be grateful if someone helped me fix all of them because I’m tired now 
ALSO ALSO, props for whoever figures out what kind of yoyo I have, HINT its in the picture
LAST ALSO AND MOST THANKFUL: Kim-Lan fixed all of my errors and many thanks.
