in TC's Vin version by Steven's Designs, apparently
these extra magnets are in the FEET
of both the corner pieces and all 24 edge wing pieces
I can see how this would provide a bit more stability
and also to balance out thw standard corner-to-edge magnets
and especially the wing-to-wing magnets in the edge pieces
The extra magnets in the new SD-TC Vin version would certainly balance lut the INNER slices
since the new magnets add more magnetic strength to the OUTER layer turns
This design would not improve overall stability by as much as core-to-corner magnets
And it certainly does not take away any og the magnetic stewngth in the inner alicesy,
which is one of my pet peeves re: 4×4's
Personally I use L middle or ring finger for M and M' and L ring+middle for M2
And ring/middle placement is good, so I'm not letting HALF of the inner slices nive w/o the other... so I don't want or need strk g inner skice magnets.
(much less DOUBLE magnets as some cubes have done...)
Which is the main reason I can see for cube mfg's to make inner slice magnets sooo strong
and that just ain't necessary (from here knn in referred to as "SSARY" !')
Overall it seems highly likely rhat core-to-corner magnetixation still reigns supreme atm for improving big cubes, even the 4×4, the little guy ...
There is probably a way to explain my position on this that involves even more verbage
perhaps
@Bingus Ringus McDingus [aka B.R.McD] can elaborate ... a bit ...