Any interest in Gen 3 Solid roller lifters?

Without an adjustable valvetrain I don't see the point. As to running a dual valve spring could you not have a valve made with the lock groove located down enough to give rocker clearance? I'm sure it would open up other issues,but has anyone any experience with this conversion? I'm not keen on beehive springs and the thought of a cheap spring taking out a build really leaves me hesitant to do a late hemi.