I play at higher levels of skill more, and more frequently (ie a few larger tournaments, and with pros from time to time) and I can honestly say, most edge gaurding techs with fox are far to risky against anyone worth a ****. There are three methods I like to use that will get the job done, and if they don't, won't get you gimped ,yourself 80% of the time. First, ofcourse is the shine spike, while it is pretty difficult to hit with most the time, its quite an effective edge guard AGAINST CERTAIN CHARACTERS. Works well on Link, dorf, marth, olimar, and the like. But if your trying to gimp Pit, MK, Diddy, Rob, or those like them with the shine, obviously, your wasting your time, and asking to get gimped yourself. To deal with these winged tards, I find knocking them off the stage(diagonally), quickly turning around, back jump off the stage, wait till they get to the edge of the magnifying area, preform a double jump, and while rising preform a bair for the ko, Dont go to far out ofcourse, if done right, you should nail them with the bair, and be able to return with a side B. (don't try that against MK unless you want to get shuttle looped. Works well on rob and pit though) Last but not least is the edge hog. Self explanitory. Anyway, that works for me, and I've tested it on excellent players. Take it how you want.