This video gives a great deal of detail to those trying to fit a double hinge to one of their doors. (It is boring for everyone else and they should not watch it.) When I bought a double hinge it cost me £25.50 and had only three lines of instructions. When I first looked at it I wasn’t sure whether it was backwards, forwards or upside-down. Before you fit your double hinge just watch this video and it will give you all the information you need to do it both properly and successfully. The instructions here are total instructions included on 10cm x 7cm set of instructions sheet in 4 languages. Very Important 1. Before installation lubrify with oil or grease in oil holes. 2 Tensioning of Double Action hinges. Tension Ring. 3 Tension lever. 4. Locking pin. 5. For safety, during mounting use protection glasses.
I have written to the makers IBFM and suggested that they put more instructions on their sheet or issue a video.
Obviously once I had got the hinges in place then I tidied up the wood around it.