Two outserts that really stand put for me are the TI two piece from Ethics and the same version from podium. Both have been about as good as I can find if 4mm outserts with standard threads. The second tier of good components options are the one piece ss/al or SS versions for both Easton and Victory. Both will make you a pretty robust front on 4mm shafts. Component wise it's night and day better than it was 10 years ago.