1/4″ alloy plate bolted to the underside of the lower triple clamp. Just cut out by hand with a hacksaw and file, but it’s functional and looks okay for this application. At some future point, I might get around to smoothing off some of the saw marks and flap wheeling the inner hole where the dykem is. Or I might not.
No credit for this design goes to me. I blatantly stole the idea from a clever fellow on the Bultaco Metralla Facebook group.