Good JOB! I think it looks very solid. That should out last the life of the boat. Your bow rail is probably stronger than your cleat now!
Just take care when you drill and tap so you get a straight hole. You can work on my boat anytime.
I have several projects in mind that require that kind of destruction/rip out. I want to put in a second door in the pilot house and put in a transom door. Both will require substantial beefing up to maintain integrity.