I don't know the SW mods, but if the xCube Mini is finally out there thanks for the reminder... I've been waiting for user reviews. I do have the xCube II.
I like the fire bar on the SMOK, though some may not. YMMV.
The xC Mini, SMOK Treebox and subsidiary Kooper 200 (though not the older Kooper Mini 75w) have the Ti and SS modes pre installed, as well as close to all of the user adjust options of the xCube II. I'd still prefer the full schmere and the square display of the xCube and xC Mini.
And of course... that means no messing about with the still dodgy BEC App.
I believe the TC was corrected on the xCube several revisions ago, though I haven't run tests myself.
And the xCube, like the SW apparently, lacks direct wattage control in TC modes. Instead it has a 5 level "initial hit" or "ramp up" setting (and single/dual coil setting). Different... but it works.
Just curious... did you reject the VTC? Mine's working well for SS.
Still wanting the xC Mini as well though.