No, never tried. Of course, I never owned a dildo until last year but I still wouldn't have tried - wouldn't have occurred to me and I have no interest in doing so.
Whatever technique I have was cultivated by what worked and didn't work with my lovers. My husband says I give the best BJs but that's because I concentrate on doing what *he* likes. He thinks I'm the best and that's all that really matters to me.
Another man may think I'm the absolute worse at BJs.