sorry, absolutely forgot to update this issue, as I was busy attending various other topics.
well, the oil drip is still very small. still a "nose-drop" up front.
I have spoken with quite some people, very knowledgeable, and we togher concluded that it seems to be the rocker shaft seals.
when I took off the bottom covers the other day, I further notced some oil in the recess, very obvious, as I cleaned all areas last time.
so the shaft seals are leaking on the inside too (not all of them).
well, its a high mileage daily driver, so for now, I'll leave it as is, just sealed the outer shaft sockets with some hylomar and will observe that, before I spend $$$.
(before cleaning pictures)