i'm very confident that i have'nt, but i do have a element of doubt now

as far i know there are only three place's where oil and water get close,

the turbo and you'd have to be a blind fool to get them wrong,
the head gasket, i find it hard to belive that it could have mixed 6 litres of coolant and 4 litres of oil in just over 30 secs and the engine ran perfectly before it was removed,
and the factory oil cooler, now there are two pipes out of this one to the heater matrix and one just at the back of the inlet manifold. only one of these was removed, the one to the heater matrix which has been put back in its proper place.

so i'm still none the wiser.