So, after cleaning the oil out of the gearbox cast webs yesterday at around noon it hasnt filled up again, which is strange because I havnt repaced the vac pump yet. Done no work, and it hasnt leaked anymore. Before it would fill up again after cleaning after about four or five hours.
After approx an hour at 50/60/70 it hasnt smoked again, but there is still a faint smell of burning when stopped with windows open, or if you open the honnet and put your head near the engine. But no smoke.
I think tomorrow I will replace the valve gasket anyway, and give everything a good clean up. Then I will see if it still smells after cleaning. Im not receiving the vac pump untill next week so wont be able to replace that, but as I mentioned it doesnt appear to be leaking still (if it was that).