3♦ - 3NT;
2D was an invitational or better raise, all else was natural.
Correspondent: West's percentage of error / Worst call
Collins: 0% / 3NT
Noble: 70% / 3D
Kevin: 100% / 3D
Randall: 20% / 3NT
Memphis MOJO: 90% / 3D
My vote: 85% / 3D
Consensus: West's percentage of error: 61%. Worst call: 3D.
Thanks for all the responses! I'll know who to turn to next time I have a disaster.