I bought this in part because it is offered by Falk in Falk Shop as matching accessories for the Navi F12 and recommended ... Now that I've tried it, I do not, however, completely incomprehensible. Yes, can be set to "right" size, but that's about it. Fiddly handling and then just not tuned stir ... completely wobbly construction - while it looks in the picture from as stable - fallacy. Not recommended - more than in its reconstruction with Velcro or adhesive tape ...
