Lots of mast testing. Had a few runs on the 7.8 to start, then moved onto the 7.0. All the best runs were with the 7.0, especially as it picked up steadily through the day. 7.0 felt really good on the medium board today, and maybe this is a better combo than the 7.0 / 90. I need to test more head to head, but the sail is so easy and controllable, that I can survive easily with the bigger board. Most of the day was spent reaching and testing with only 2 or 3 'speed' runs at the end.