I say let him go first...your name will still be on the project. Humble, meek, slow to speak and quick to listen. The truth always comes out, if that's what concerns you. If this guy tags his name to projects in which he only does 10% of the work, eventually that's going to catch up with him. People will notice. One day he's going to be trusted to eat the whole apple pie; and he'll only be able to finish a few slices.
Meanwhile, don't blow your own horn. God has given you a great gift, He deserves the credit and the glory. If I were you (and I have been a lot lately) I'd rejoice in what God has given you, it's amazing! I'd let this guy go first if he wants to be proud. It's obvious that he needs the spotlight on him, maybe he's insecure about other areas of his life that other people will never understand?
I'd take things quietly, and let my rewards build up in heaven.
