Great job, OP.
I met with our plan administrator yesterday to inquire whether this was possible. Turns out the fact the company does Profit Sharing makes After Tax contribution limits very complicated to predict while at the same time it throws a wrench in the Erisa Calculations. Good problem to have I guess.
Honestly this may be a good thing for us. I still want to purchase a home someday and I would never make it if that money were strictly tied up in illiquid retirement accounts. Yes, I know I can withdraw or get a loan for a down payment, but psychologically I know I couldn't stand to do that.