Thanks for clarifying that. I have never heard the pickup in question referred to as a “GT3” – although that is officially the final identifying part of the item’s name. Most users refer to this as an “internal GK kit” and then specify whether it’s the GK-2A, GK-3 or GK-5 (6- or 7-string) version for simplicity’s sake.
GK5-KIT-G6 and GK5-KIT-G7 kits are floating around now, too.
“With hex pickups, I don’t think speed is really the main issue, since a few years ago. The competition seems to work 
. But there are certainly other aspects that are important to account for, such as spurious and missed notes, dynamics and responsiveness to low dynamics (left hand) playing.”
Very true. Latency seems to matter to musicians who value “feel” very highly (i.e. the common analog versus digital gear argument).
Although missed notes, dynamics, spillover, left-hand playing nuances can be directly addressed by a better divided pickup (to go along with the custom controller).
Thank you to all. Signing off for now.
Hi @lpspecial, I would also be interested to know what latency values you measured for each individual string of your guitar. Have you ever tried measuring and comparing the latency of bass strings?
Thanks for all the measuring!
Please help us measure the upcoming “Flash” trackers, both hexaphonic, monophonic and polyphonic versions 
I for one salute your efforts, and I’ll line up to purchase your device if you are successful. Best of luck! 