Pat, If it were me, I'd get rid of those and replace with something tried and true.
I myself, have gone to alum. nock adapters that I epoxy into the shaft and use glue-on nocks. Been doing this for over a year now and have not had a carbon crack on the back end like they used to with push in nocks on a hard impact...not one!
I've blown nocks off the adapter, but they are easily replaced.
IMO...a much better/tougher arrow...arrows simply last alot longer up here in my northeast rocky terrain.
Nock adapter in back, and footed in the front and they are almost indestructible except for "slapping type" hits...