YYR Blink with whatever string is on it. I don’t carry extra so tough luck. Besides unless they yoyo I’m not planning on doing too much yoyoing. If they do yoyo, I just bum strings.
I got my Crucial holder at PNWR 2012 in Feb. and the letters haven’t even worn off after using it every day for over a year now. I wish I had bought more while I was there but this year crucial didn’t even have a table I think.