Off topic but it was in this thread and I like to try to be as transparent as possible about everything so:
Ultra - I did manage to get Death Horogium T125CS to OS Duo Cancer AD145WD about three times with an absolutely mint CS - but I could literally see the margin slip away and towards Duo over even 6 battles to the point it ended up 3-3. It was really weird to watch.
The entire reason it works in this instance is that Death's under-wings are at the exact right height to keep hitting underneath Duo at that specific height matchup (noticing this is why I sat down and tried it), the tip manages to stay relatively well balanced so the rubber doesn't interfere much, and their stamina is close enough for that all to matter. Just a little tip wear can change all that, however. And D125 seemed to perform identically to T125 - it's just a height thing not genius part design.
So, neat, but no CS isn't going to find a home in stamina for quite some time (and even then mixed abilities would likely end it up in balance anyway).
As for SF, it didn't work there and it also didn't work with T125SF on my Phantom (the one that outspins my duo to a ridiculous degree). Too much friction (you know stamina types want to minimize energy being wasted as movement/grip right?). T125CS with my phantom was close but still pretty dodgy (and identical to D125).
Using WD, Death T125WD and D125WD do seem to do well against Duo AD145WD - no difference in the margins though.
It failed against SA165 (and as did using AD145 on death to get the same height difference but angles are going to be different there anyway sooo) but removing the disk made it work - similar contact I guess, and the disk protects against it a little.
Overall: It's a height match up. It is highly possible it could be specific to matchups between these two wheels, too but I'd like to see duo v duo and death v death first to check some stuff (mostly the former though). T125's design has nothing to do with it and SF still sucks as much as ever and a single CS might last you one match at a tournament if you're lucky. Historically the 125's were basically outclassed and beaten by the low tracks, so perhaps with the upward shift and overhang wheels 125 is now LTSC lol. Of course this was only against AD145, not W145 - I don't have that, and it was quite close so this could be entirely irrelevant (except maybe against 160?). And Death's ability is due to the wings not some amazing weight distribution which isn't actually visible on the top.
Everyone needs to keep in mind that this was not full testing - I'm really tired and I'm just not interested at all in MFB, but I felt this was enough indication to post about given what I found.
So yes Ultra in the many shots you fired you managed to hit the target at least once (and miss a whole lot more but nonetheless progress is progress I guess?) - do what I say and try stuff before talking about it (and when you do talk about it, be humble) and you might end up doing good (though to be fair that's basically what everyone else who has a vague idea of what they're doing does - think about something and why it might work, try it, and then post if it does). Actions speak louder than words (and poorly chosen words aren't forgotten quickly)