I'm digging the APR page, but why can I not change the runway heading? For example, if the approach info for airfield 50 includes landing on runway 00, shouldn't I be able to edit that and specify runway 18 instead? When I click the OSB associated with runway heading, I can even input a new number, but it's never accepted. Am I doing something wrong, or is this a known issue? I couldn't find anything when I searched.