Assuming we c/r the flop, and he calls, on this turn I'm still trying to get the money in. He's very likely to still felt his overpairs with a diamond, and there shouldn't be too many flush draws in his range anyways (AdKd, AdQd, maybe KdQd, but doubt it). Whether it's by making a committing sized bet and calling a shove, or shoving ourselves, I'm not sure.. Too lazy to add up the pot + bet sizes