In sailing, most major events (and most small events for that matter) have as standard practice a "drop" race or "throw out" after a certain number of races are completed (usually 6). This is very standard in sailing. If you get in only 3 races (for example) in for the weekend, all races count because throwing one third of the available sores would greatly skew the results. But once you get a solid number of races, six, everyone throws the worst and only your best 5 count.

I love the idea of "throw-outs" (otherwise referred to as mulligans in sailing) in soaring but think the adjustment should only kick in after 3 solid contest days are completed (.25 * WDSD). Beginning to "tune scores" after only one or two flying days seems a bit early.

Sean