Looks good. Where I first saw the jig was in a mantle factory I worked at for a short while. They were using a long narrow version of it to make stopped flutes in the faces of columns that the mantles sat on. One pass against either side and then added another spacer that sat on top and against the fence on either side and that put a groove down the center. By adding a spacer at the ends we made the two outside grooves shorter than the center one. I liked the looks of that so much I did it on my own mantle at home. Just saying that that design of jig has other applications too.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.