Here's a nice UNIT prototype with reasonable improvements:
- still two handles and Allulla (I guess for premium models)
- no windows
- new canopy material that looks like Dyneema Composite as PPC wings
- radial sail panels
- two battens instead of one
- new material as junction in between the handles, that also connects directly to the canopy
- maybe smaller leading edge radius ?
full video here:
?t=1057