I was a failure at sharpening the carbide bit. It was sharper but not good enough to do a good job in oak. I may try again to sharpen it.
I am making a plain heavy duty Red Oak box for some gear for my son. I decided to make thru dovetails instead of half blind. If needed, I can buy bits for it and get them overnight. I did a trial and the first attempt was very close and I am happy with them.