The collar that contacts the action and determines alignment could be shimmed or trimmed down to move the tap in the direction you want.
But first you should be really sure you have an alignment issue.
Is the gun accurate?
Is the tap hole off center with the loading port or the barrel?
Do you have any rotational alignment issues?
If the tap is well centered with the barrel, but visually off center with the loading port, OR if the gun shoots well, leave it alone...