Lunati Lifters

Years back I ordered a Lunati cam and their solid lifters...
Oct 5 2014 099.JPG
The real narrow center worried me. I thought they would result in a loss of oil pressure so I returned them.
Oct 5 2014 101.JPG

Strange design....I never even slipped them in the engine but I suspected that at high lift, the oil would gush right around the middle.