We've done this to death in the past, but my biggest concern is that the reflective plate on the back improves visibility massively in the dark.
A Morgan with non reflective plates and two tiny round red lights set low down is lost amongst traffic on busy motorways in the dark. I followed one once on the M42 and it was almost invisible.
I can get them legally in WA. The "white" is reflective and I was surprised just how visable.
