We are looking into taking over the third party administration of a plan that currently has a QACA that utilizes the 3% non-elective contribution safe harbor method that vests after two years of vesting service. We are exploring changing the ADP safe harbor method to traditional 3% non-elective which is 100% vested immediately, but if the administrator is already successfully administering the QACA, I am thinking this may not be in their best interest? I think my question is, "is the ability to administer the QACA properly the only difference between a two year difference in vesting requirement, or are there other considerations?" A two year vesting schedule seems like a huge benefit for a small trade-off. The end goal of the program design is to add nonsafe harbor non-elective contributions to the plan and potentially also adopt a DB plan, I want to use the QACA safe harbor contributions towards top-heavy and 401(a) testing if i can, and if it makes sense to continue to maintain the QACA.