I'm soon to be going WWWs on a black 09 RK Police with non-spoke wheels. No doubt spokes look better, but WWWs on any black bike is doable. Classic black/white combo.
In contrast, I'm not sure if I would do WWWs on, say, a two tone/purple/whatever bike.
El Rey I have them too. They are '71 scripts I got off of eBay for around $25. I had to align and drill holes. Then press clips on from the inside.
See, I have a Road King, so there's already holes, but the tabs don't line up. If I drill, you'll be able to see the holes when I mount the emblems, so I may go the 3M route. We'll see. Your's look great, I love it.
And if anybody's wondering why I'm puttin g EG emblems on a RK, it's because my bike is going for the '65-'66 EG look.