I have run the yellow coil with box 2013 on my V1's since around 2006 or so. They work really really well. I always thought of them as a points replacement, and not so much a race CDI. Just super convenient.
I have seen a noticeable failure rate that I could never quite figure out caused. I had theories that checking for spark with the plug not touching the cylinder might have done it. It has always been the box that failed, and once I put on a new one, away it went.
It is cool that people are really digging into Pietcard.