Trimmed with multitool and long sanding board. All good, one ply bubble on the overlap, marked for a patch.
Marked up the upper Winglet trim line with the plans template. Rather than hacking all the way through I marked it up on both sides, cut the glass with a multitool and cut the foam with a hacksaw blade, minding the conduit!
Cut the winglet struts from some old pallet timber.