We are far removed from UK, don't do nearly as much trade as with USA which is why we have such a large deficit to you guys. Yep I have had the square top since it came in, it isn't faster for heavier crews like me because the top lays off in a breeze turning it into a pin head anyway, so my top speed is down a bit but with the 10 to 1 sheet it means smaller people can enter the class. Here's a video of a couple of weeks ago on a 50km race showing how it keeps the bows down a bit
https://youtu.be/Wf-D_3na1e0