A locksmith has tried to modify my Weiser Deadbolt into ASSA lock. The deadbolt is keyed on both side. The locksmith said it must be change both core into ASSA because the ASSA tail piece is not turn the same angle as the Weiser. Ok, after both side changed into ASSA, the lock open and close inconsistently. It does not retract and extend the bolt normally when the key turn back to center. The locksmith also try to change the bolt to ASSA but it also does not work properly.
The locksmith does not know why and he said that it should work.
I have been trying to figure it out but do not know neither.
WHY?