I need to remove the injector sleeve to gain access below burner plate but someone before me rounded the edges of the fitting and no socket will grip it-too thin and soft metal for vicegrips to work.I have used a aerosol penetrant to no avail.the big problem is there is nothing to grip firmly to.It has been suggested that I use an"Easyout" but I'm afraid I might damage the female threads which the injector sleeve fits into. HELP!!!!