Any descent mechanics blue smoke?

[blinkyeatu]

i used 10w/40 semi syn.
dont think its the pump. although ive not removed the intercooler to have a proper look, it seems to be coming from above the head and covers the whole back of the engine left to right not from a single point.
i feel that alot of the smoke is down to the timing, as it went from a small cough to well what you can see after i tuned it (but also after i decated but told defiantly not that)
then i think abit of its down to valve stems, as my theory is when i overfilled with oil, the pressure above the head blew the valve stems and the cam cover gasket