my engine builder looked at them, I run the standard Harland Sharp rockers on them, like I did the Eddie’s.
over time, I might put a bit of extra wear on the guides, but ran the eddies 4 years, everything still looked good, ran the Bloomers last season, zero issues. 6500-6600 rpm, at the track, decent amount of street driving.
I am sure it could be perfected, I just haven’t. Very happy with everything, never had a valve train issue