Hughes Engines did good on me

Purchased a set of rockers arms 3 years ago - am getting to assembling the engine now finally. Anyways, I noticed the new shafts are grooved and they exchanged for my old ones (nongrooved) on the house - Thanks Hughes!

are you talking about the angled hacksaw thin slits across the bottom 15 deg offset oiling holes on the shaft? I would prefer those. what am I missing here? Dave Hughes sold me a circle track cam & the RPM range was higher than what I ideally would have wanted but when the eng (360) got "up on the cam" ~6200 ish it came alive like you wouldn't believe, it was like a shot of nitrous

I've been dealing with them for over a decade now. They have always done me right. Great knowledge and sound advice, too.