Oops, late to the party. I haven't even updated my firmware yet (I know, lazy me), and haven't even played with TC all that much as I usually use my DNA mods for that (I like the software package for that for fine tuning). And yes, those are the TCRs for different materials for TC. The reason I like the DNA eScribe software is so I can set everything up without a dozen different button presses for every function. There are a few mods with touch screens already out, but none that seem to have captured much attention other than for the touch screen feature.
Back to the Merlin. It's working really well. I've been using Kanthal as I've just been messing around with stuff, but will rebuild with a 316L coil tonight. I have SS in all my other tanks except for this one, so it's time for the swap out. It remains my go to for reliable performance and flavor, but I've also been enjoying my others in between.