Client's attorney is proactively (no problems or lawsuits anticipated, just want to have an objective look) hiring actuarial firm to do actuarial equivalence study respecting client's frozen defined benefit pension plan. Client has hired a particular actuarial firm for consulting on lump sum window, and other matters through the years. The actuarial firm does not consider itself to be a fiduciary respecting the plan, but in terms of best practices, does anyone have thoughts on whether or not another actuarial firm that has never worked before with the client's plan should be selected to do the study or if it doesn't matter?