Just bought a new French toilet (in UK), but struggling to get the centre, dual flush, buttons looking/working properly. Have instructions, but fairly complicated - and in French!! I know the basics, but can anyone help - preferably by pointing me to a website where I can find English instructions/diagrams? Make of the valve/toilet no known, I'm afraid, but it seems to be called "mecanisme econmiseur d'eau autoregable 45" with a logo showing "NF". Help gratefully received! Cheers.