Looks nice! My only concern with the design is the stiffness of the yoke. People use them made like that on chainstays but the main load there is at 90 degrees to what it is here. The stiffness of a flat bar like that might be 1/5 that of a 20mm thin-wall tube. On the other hand you do also have the chainstays to resist bending and it might actually give a beneficial suspension effect!