You can see there I had a really good day on the 18th. Couple of things I'm noticing with the Brock String. I get tired really quickly. I can do the Brock String really well for the first 20-30 seconds. But then I almost immediately get tired, and then my ability to shift from bead to bead becomes more sticky and less controlled. Another thing I notice is that I can fuse and accommodate for each eye very well for the first 20-30 seconds as well. After I get tired and things become sticky, I notice that simultaneous accommodation becomes harder. Tomorrow I might try tDCS with Brock String to see whether that gives my visual system more energy so that I don't get tired as quickly. But I have noticed that it takes more and more time for me to get tired with practice.