I had to teach a night class tonight but had just enough time to cut 4x Super Bertha fins from 2mm plywood before putting my own kids to bed. First time I tried to cut two stacked sheets at once with good success... These fins are pretty large so use up a ton of my 200x300mm material (particularly since I am planning a Booster Super Big Bertha and a Super Baby Bertha -- that's 12 fins sheesh). I want to try to launch a Booster Super Baby Bertha just to be somewhat unique in the Bertha space!!!