Whitey, I have several wooden film-only holders. I also have metal film holders, plastic film holders, metal plate holders, wodden plate holders and plastic plate holders; as well as "plate or cut film" holders in both wood and plastic.
In general it's only newer cameras that are not picky; old European plate cameras are a complete mess of different incompatible plate holders. The FKD cameras are the exception - their holders are still incompatible with everything else.
OK. Thanks for that. Guess I've just been lucky in what I've bought.