[JoeAirPort]

It's a little late now but....you take some fine FG cloth in 1/2" wide strips and thinned epoxy....apply just one layer and stuff it tightly in the corner on the inside of that lip. Do this to the entire lip and it will never crack again. You can either paint on the outside or even easier just iron a little piece of matching covering over the crack.

If you ever buy another plane with that same lip, do it right away and never see a problem for the life of the plane. And by the way, any plane can do that. Not limited to any brand.