A note to readers,
This post is on the edge of the rules against advertising or promoting other websites on PPRuNe. I have approved it because it has been presented as a free service with a benefit to recreational pilots. Please remember that PPRuNe does not permit unpaid advertising, and does not promote specific aviation products, services or websites. As a moderator, I am viewing this as a "pilot community" effort, but not a "promoted" service, nor in any way accredited for accuracy...