The shoe has finally given up the ghost on my Vivitar 285 flash. There are metal replacement shoes available on ebay for pretty cheap. It appears that they don't use the standard vivitar sync cord and use a double-ended sync chord. My questions are: Has anyone out there changed one of these? Have you used the aftermarket shoe? Is it difficult to change? Do I need a wiring diagram? I guess the flash doesn't owe me any money; I bought it about 30 years ago! If I can fix it, I can probably get another 30 years out of it. I did a search on this forum, but could not turn up anything. Any help would be greatly appreciated. Rick.