Indy RHS head failure

I want to say that I found this info elsewhere on the net, and I am not a super awesome engine builder. Heck I seem to just store engine parts for some odd reason.

But I have been looking into building a budget spring setup for some EQ heads.

I saw quite a few places where Comp keepers have been failing. Most recommended was crower keepers. ALSO, there was a statement where the +.050 keepers to add installed lift had the lock groove lower in the keeper, which is where there was less force applied if valve float occured. Now this is bench race stuff, but I would think those two things would be something to consider. Thats why I asked earlier. I cannot tell in the OP pictures because I dont know what the higher installed height keepers look like. But I am eyeing this thread closely to learn.