Going to let the pipe seal cure over night before i top up the coolant and run the engine.
The small pipe between the thermostat housing and water pump is home made - the old one having corroded away long ago.
The old pulley which is made of brass has been bolted on. I have not replaced hoses yet as there were no obvious leaks from them.
I also ordered a gasket as it was only a couple of quid and quite fiddly to cut out.
One further observation is that the metal quality and casting is much inferior to the old one - real gun metal and the bolts appear to bite into the casing - probably should have used washers on them.
Presume Mitsubishi buy in their own replica parts nowadays!