Oil leaks of unknown origin - rocker shaft leaks ??

[carrpet]

I have a 930 with a 2 possibly 3 minor oil leaks, but it is not obvious where the leaks are coming from let alone the cause of the leaks. There are oil drops which form on the lower cooling fins at the front end of cylinders 3 and 6 (and possibly the rear of 4 as well).
I have checked out the triangle of death with an endoscope (I had the engine out of the car less than 1000 miles ago and fixed the previous leaks on the TOD) but there is nothing obvious and the oil cooler looks fine. 
However reading an article on Pelican (see link below) makes me wonder if I have a leak on the ends of the rocker shafts which are on the outside faces of the cylinder heads that I can't see, with the oil running down inside the tin plate. All of the rocker shaft ends appear to be hidden from sight by tin plate, oil cooler, heat exchangers  etc etc.
I have read a number of threads on the subject which have great photographs with the rocker covers removed and engine out of the car, but it is not obvious to me where the oil leaks become visible suggesting that there is a leak on the rocker shafts ?
Any help in identifying the source of the leaks would be appreciated. Thanks.
I will worry about fixing the leaks if and when we can establish the source !

There is an article on Pelican covering rocker shaft oil leaks where I have also posted this question with one response. Interestingly nowhere in the article is there any discussion/photos  about how you know you have a leak in the first place

Rocker arm shaft leak - Pelican Parts Forums

Edited July 10, 2022 by carrpet

[proporsche]

well? in your case - i do not know the history ,could be that your camshaft housing to heads is leaking..

here is how it is supposed to be sealed..sorry for the long video

Ivan

[carrpet]

On 10/07/2022 at 23:00, proporsche said:

well? in your case - i do not know the history ,could be that your camshaft housing to heads is leaking..

here is how it is supposed to be sealed..sorry for the long video

Ivan

Thanks ! You may be right ! Not a 5 minute job then !