Apologies if I’m asking this in the wrong place. I’m just trying to find my way aournd the new WindWorks site. There are some fantastic ideas here which I know will make a dramatic difference to my playing. (I always play better after watching an M2M video or two!!) However… I struggle with the concept of “tension at the aperture corners”. There is a picture showing where the aperture corners are, but what is meant by “tension”? How do you create it, and do so without clamping your lips? Do you “pull the lips sideways” or push them forwards? Or is there no one way to do this? It is such a fundamental thing, but I really feel I’m missing a very important point. I’ve searched around the site, but I can’t see any clarification. Could someone point me in the right direction please?