Thx, Lostboy, just what I tried to explain above. An example from the last Austrian Ski Test
where I work in the development team (there also is an extra public test for consumers, as a buyers desicion guidance, which doesn't match in the official results). A man in his sixties who is a 50+ days/season skier and a steady customer of my ski workshops asked me rather despaired to watch him skiing as he felt he was doing everything wrong. As I knew his strong and weak points it was perfectly obvious to me that something was wrong with his skis. Well, it turned out, that some companies delivered their skis out of the wrapper and some of those with lacks in preparation. After preparing them the guy was happy again and also the average rating was very much better.I would like to point out, that some companies have a very nice finish, and I don't intend to create a panic. As buyers of new skis anyhow need an expert service to adjust their bindings, it's obvious to ask to check the skis at the same time.
If the concave is not a problem for skiers (which apparently could be seen from different points of view) anyhow it is a problem for:
- skiservice --> inconstant grind stone scuff, reduces the durability of the stones
- skirentals --> due to the necessarity of frequent tuning in ski rentals concave skis evidentially have a shorter durabilty.
If the concave is not a bug, but a feature desired by certain ski manufacturers, there is one big problem to solve - not to loose the concave through common mechanical preparation within several tunings.