Radio South CA hinges on my Focus, even had a midair with a sport plane last fall and didn't evn know it as it still flew fine at landing noticed that 2 places on the wing had been cut, one place had a slice about 7" long not all the way though the wing, the other was at the leading edge about 1 1/2 slot about 4" into the wing completely gone, I'd say if that doesn't make hinges come loose, there probably safe, oh and I was flying the FAI P03 pattern all last fall.

Steve Maxwell