Requested oiling mod info

As another experienced observation, I've seen a lot of #1cam bearings in poor condition on bone stock mills with little explanation, i.e. stock cams & weak- *** valvspring loads, the amount of build-up time for the left gallery has to be shorting the feed to that cam bearing. JMO.. the crossover would shorten the path & take the torturous "V" out of the route.
I agree, once static pressure is achieved in the right gallery, only restrictive passages/poor transitions should be responsible for a lack of supply.
If those Pros were seeing endurance issues with #3&#4, and this fixed it for them, I'm not going to argue the whys. I would discuss it with them, & if Their opinions on it have changed any. As per the posted txt, it became an issue when the clearances were opened & very high rpm's were achieved, the top-end feed issue is a good point.