No, unfortunately not yet. Yesterday the wind wasn't enough for the 6.5, so I was on the water with the M6 7.5.
I'm also very excited, according to a Severne expert in Holland, the M7 6.5 in particular has been improved.
hmm reintroducing something I was glad to see back of with the massive 2nd batten over hang... not a fan as it was so easy to break that batten if not careful.
In the Netherlands the Mach 7 sails are available from importers and surf shops, but there is no sign of them on the Severne site yet.