I just received my Channel Islands boardbag, a coffin bag for 3 surfboards, it looks perfect to fit my Ginxu super k 92L, plus foil and at least two wings. The padding on the inside is unbelievably thick and sturdy. And yet the bag is lighter than my mystic star wingfoil bag. More info here:
pukassurfshop.com/products/channel-islands-ci-triple-6-9-traveler-boardbag-2If you are in Europe the guys at Pukas were super helpful in measuring and weighing the bag and providing me with info.

I had never heard of CI boardbags but what I see seems to back up the few reviews I found.