DJR,
i have removed the stock oil water cooler and put a remote filter set up in its place, little bit of dickin round with the adaptor for the threads but nothing major.
I have now installed a Mocal oil to water heat exchanger this i have installed in series with the water flow from the radiator into the engine. along with this i have a electric pump in series with the mechanical pump which turns on at 85 degrees. Seems to work well at the momment. Set up required to install quite a bit of extra piping as electric pump is installed in front of passenger wheel, increased the volume to about 10 litres in total. And i need it over here going to be 45 for the next 4 months :-)