Making a hollow molded wing (24 min 8 sec)

Interesting that they don't do any leading edge trimming ... or any edge trimming for that matter.
The excess veil cloth from both halves just gets clamped in the mould flanges.

Yes, I thought so too. The veil is so thin as to not be much of a concern. However, the main fabric at the trailing edge is.
I try at least to cut my main skin fabric 2 mm short of the trailing edge. That then provides the taper off required to finish with it reasonably thin.