Managed to shim/centre most rocker arms to valve tips , seems i can't get four ex rollers to centre , they sit around 1/3 over to one side of valve tip , any ideas?

Decided to go pushrod oiling on this 605" , the last time this was built i plugged the oil hole in lifter , i've now opened the oil way in gallery side to .030" , had Smith Bros make me some heavier pushrods with oil holes , do you guys plug the oil way in rocker adjuster? , seems the oil shoots straight out the top of adjuster if not plugged.

TIA.