Pushing for DFA funds in firms 401(k) plan.

[CobraGoat]

I work for a fairly large law firm (300+ total attorneys). Our 401K plan is pretty good but by no means great. There are only a couple vanguard funds to choose from and no Dimensional Fund Advisor funds. Over the past couple months I havebeen rallying the troops to join me in requesting our retirement plan include DFA funds.

With that in mind, do i request (if our plan is even DFA registered) to have the max number of DFA funds added to our investment choices or only specific ones to fill the gaps of where our plan is presently most weak? Ideally, Id like to have 9 DFA funds added to assure "perfect" allocation. I think that is unrealistic but I don't know what is reasonable. Thoughts? Anyone else attempted this with their company?