Re: cam cleat removal
There are several methods used (including screw extractors, assuming you can gain no purchase on whatever is left of the screw shank), but what has worked for me for the vast majority of those is to carefully drill through with a carbide drill bit one size smaller in diameter. If it's a stainless screw, it will take longer, but I've never had that fail. If it's a big enough screw, you can drill partially through the center (deep enough for an extracting bit to bite) then back out the screw. Be aware, that if you overdrill too large of a diameter hole, you may need to refinish the hole with thickened epoxy, then re-drill the hole for the cleat screw.