From watching video review with Ed..(did not understand many words) i saw some new things
Similar to Speene X19 the leading edge has support from very thin curved battens
There "seem" to be a batten support at each and every end of the air cell compartments
Creating a stiffer LE profile is great idea for SP4..prevents deformation..improves aerodynamics
Another improvement to increase air pressure in more air intakes...counted 6 for the 8M SP4
We may see the return of 7 intakes in the larger sizes of SP4....SP2 & 2.5 had 7...SP3 "only 5"
I may have noticed a bit different air intake "entry way" also...but not so sure about that.
What did you guys see or know so far