408 hyd roller, too much spring pressure?

Bewy said
Rat,
I know it wasn't you who made the claim about lighter components, it was Phreakish.

I am well aware that BHs are not new. My understanding is what is new is the Ovate shaped wire that maintains the strength for a lighter more compact spring, and also allows for more valve lift.

BH's DO require lighter components. The synergy is that their shape has an intrinsic weight loss from a smaller retainer.
The requirement stems from the fact that you're losing spring mass. Less mass means less energy the spring can absorb - there's no free lunch.