I am older as well, 76. I am concerned if I take a fall take a fall at even moderate speed and the skis do not come off I could do serious damage to my knees or lower legs. I too have backed off the din value, but do not want the skis releasing when I catch an edge or make a correctable mistake.The ski shops consider ones ability age etc. and do set skis accordingly. I figure they are the experts and usually go with their recommendation. if the skies do not release after a fan that I expected that they should have or if they release while I am skiing I adjust them a little, but that is it.
Peter, there are four factors used in determining the din setting and they are age, boot sole length, weight and skier type (levels I, II, & III). While the skier type is indirectly dependent on ability, it is more so a measure of aggressiveness. Typically an expert skier is either a II or a III. Because most experts will always chose level 3 skier type (especially if their girlfriend is watching them fill out the service form), there is a tipping point in the age scale that will bring the din back down to a level representative of the release and retention rates that are most prescriptive relative to all four factors rather than just one or two.