For those uninitiated,
ZZCT was a somewhat recently developed variant to ZZ where once you hit last slot, you perform an algorithm that inserts the F2L edge while orienting the remaining corner pieces
From there you do an algorithm from the subset known as TTLL where you insert the final corner and solve PLL at the same time
I've had a few people reach out to me in the past asking for advice on how to improve TTLL algorithms, since a lot of the early algorithms are very double turn heavy rather than being optimized for QTM, let alone reduced regrips and raw speed
For ZZCT to even have a chance to be relevant at the highest level of cubing, TTLL being optimized for speed is an absolute must
I don't know how quickly this will happen, because it's going to take someone who's both interested in ZZCT AND is already competent with genning and refining algorithms with things like Cube Explorer, but maybe my recent finding will give someone enough hope to believe in the viability of ZZCT
Over the past few days, I've been experimenting with the CLS case that's just a simple 7 move RUD comm which can be performed 3 different ways along with the "Zeroing" technique
If you have absolutely NO idea what I'm talking about, I have an old video which you can find
here that explains it (though it definitely needs an update which I'll get to at some point)
anyway, I realized that because the edge solved Zeroing cases are all super nice (only 2 cases have "iffy" recognition) and that PLL setups like the BLD Yperm are possible, there's clearly a lot of hidden gold in the hypothetical subset where it's essentially a TTLL case, but the F2L corner is flipped
Actually, I wouldn't be surprised if the vast majority of these cases were a lot faster than TTLL cases on average
One of the best things about this is it opens the door for a more optimized 2nd to last step in a ZZ context, since you can ignore the orientation of the F2L corner as well as one of the 4 LL corners of your choosing
I don't necessarily think this technique would work super well in a CFOP context when things like VLS/ZBLS/ZBLL etc are available, but if TTLL + the TTLL twisted sets are optimized heavily, I think it's certainly possible that it could work very nicely with distinct OLS cases that turn into one of those 3 sets in 4-8 moves
All in all, developing this would buff ZZCT big time, and as far as I'm concerned it's the #1 place to start looking if you're serious about ZZCT