There are a number of threads online that describe various problems with Kobos in direct sunlight. Google "Kobo sunlight freeze" and you'll find them.. Inconclusive whether this is specific to a batch, a firmware version, etc. But it's happening enough to show up easily with searches. The high-tech cardboard shade helped - enough so that I would consider building a proper one out of something more permanent. NOTE:there are a bunch in our club. From memory, I think the ones that are flush-mounted to the panel rather than on a stalk mount (which mine was) seem to do better. The back of the case is protected and the lip of the instrument panel shroud probably provides some relief, especially when flying up-sun. You could probably build a nice tunnel mount like the ClearNav. Then, your investment in the panel fabrication would be orders of magnitude more than the instrument. :-)

Erik Mann (P3)