I am designing a new 401(k) profit sharing plan. I have a terminated participant who is young and has low compensation. They enter the plan and then terminate in the middle of the year. I want to use this participant to pass 401(a)(4) as it would be the cheapest option. I end up having to give him about 90% of his compensation. If i design the plan so that there is no hour requirement or last day requirement for discretionary profit sharing, I believe I can give him this large amount. But how should I handle vesting? Does he need to be 100% vested as I am using him so heavily to pass testing? Could he be only 20% vested? Or could I even leave him at 0% vested? How would you handle the vesting if he needed to be 100% vested, but you didnt want any other employees to be automatically 100% vested?