We did this too after reading the Boglehead book and forum. I say we, but DH looks over at me while watching ESPN and says, "How's our money doing?" He cracks me up. Anyhow, we have the C and S funds in the TSP (C=Med/Large cap and S=Small cap at 80/20), then my Roth holds International and his holds Bonds. Technically I think bonds are supposed to be in the TSP because that growth is not tax free and the Roths are currently. I may change it all up at the end of next year but I'm going to leave it this way for awhile. I do love the way it simplifies things!