Re: Hi from Seattle, WA!
I know little about the recent changes in Washington law. But I've gotten the feeling that they deliberately aimed at these types of bike. And, if so, that's a real pity.
You see, in most places where this type of bike was not strictly legal the police mostly didn't care as long as the rider behaved like a civilized member of traffic. But that might not hold true in a place that is actively trying to get rid of them. That could obviously be troublesome.
So I don't quite know what to say. Best of luck, of course. But you just might be in a place that won't tolerate you. I hope not.