Thank you all,

I like this idea of adding a small curve to prevent a line (or cut) on the front face.

Pilou, that's awsome!!!

All this gave me an idea, this time I used sweeps instead and with projected curves on a vertical plane on the diagonal of the top profile, it seems to work much better. Even if I still have an horizontal line at 3 inch from the top, I believe every thing is fine now.

Thanks all,
Felix