I used to love the tapered shims--hate we can't get them but....I have used dozens of sets of home made shims over the years--always with stamped rockers and hyd cams--I have never split a stand. I understand the math and all but they work on regular old street engines vs. ordering expensive pushrods. Yea I know about geometry but on a stamped rocker the pad is plenty big enough and correcting lifter preload vs. having the plunger down is a big big deal even on a Plain Jane.