I did some more tweaking, I flipped the shield (just bent it the other way) and also played with the curvature to get a sharp cutoff all along the line. You really need to follow a precise curve to get a clean cutoff, more so on the extreme sides. When I'll be done I will scan the curvature and shape of the shield for you to duplicate.
Also, looking at the before and after pics (oem RHD to this) it looks like the OEM shields are placed too high in the beam, not cutting the hotspot in the center, and as a result the brighter area is not aligned with the cutoff, it is slightly too low. My custom shield is more centered vertically and that helps aligning the hotter part of the beam along the cutoff instead of too low.