The reason I don’t do the .050 lifter rise timing is because 1) There are way too many variables that affect it. Lifter bank angle variations is a big one and 2) You can have 10 lobes with the exact same .050 lifter rise and all of them will have different intake center lines.
IMO where that valve is relative to the piston at max lift if far more critical than where the valve is at .050 lifter rise (which is .075 valve opening with a 1.5 rocker and .080 at the valve with 1.6 rockers).