I second your decision. There's probably no absolute truth here. My first and so far only ETA 2824-2 that I've serviced ended up with too low amplitude. The reason for this is still under investigation. However, I'm now servicing my second ETA 2824-2 and this time around, unlike the first time, I'm going to use thin oil for the 3rd wheel following the example in the ETA 2824-2 service video that I linked to.
you clearly know your stuff mate, and amazing quality photos... I just put them on my Tab 4 and will follow your pictorial while trying to disassemble a 2836 bought for practicing.
Thanks for sharing, sharing knowledge is what makes WRT such a great forum