I agree, if pressurized oil is needed in the left galley, a crossover or some other method of achieving that, is much preferable to taking oil from #1 main to supply it. With a system where oil is also fed in the front, a crossover plumbed at the center of the right galley would help insure the mains remain the priority.
.030" is a big hole. Did the lifter manufacturer recommend that?
The lifter manufacturer recommends not to let the engine idle excessively because there is not enough splash oiling. I figured it's better to have real oil pressure but restricted. A compromise I guess.