I followed the development of Dave Silvers pattern chainguard on facebook, and he sent the prototypes back to the manufacturer several times, and the resulting one he is currently selling is absolutely top notch. The finish is superb, the fit is perfect, and the chrome seems deep enough to swim in!
I'm just trying to convince him it would be worth his while to do one for the CB750F1, and he has a front brake caliper for the F1/K7/A under development now, they are rarer than rocking horse s**t, so will benefit a lot of members on here, including me!