Dude I gave three examples that actually work and you picked the most expensive one to ***** about.
I said tube one side and use a set screw to block the oil to the drivers side. It works and if you are careful you can do that with hand tools.
Or you can tube both sides. Why not? It actually forces the oil to the mains and that’s the end goal.
For the umpteenth time Sandborn was pushrod oiling so he had to get oil back to the drivers side so he used the crossover for that. I can think of better ways to do it. But again, the crossover tube doesn’t correct or fix what the OP is doing.
The crossover is redundant to get oil back to the drivers side. If you want to slow oil velocity drop the presser but it’s lunacy to think that the oil needs to be slowed down.
