dhemsted

I bought a spin doctor, when should I use it, just when I am using a fly or could I hook a spoon to that? Do any of you use horizontal or vertical flashers off the down rigging balls when fishing for kings? What I mean by flashers are the ones that go from your release to the ball or the ones that go off the end of the down rigging ball. This is what I mean -

Thanks

My opinion is don't use it, I tried it today and as bottom- feeder said it's not worth it. I had non stop tangles and I couldn't find bottom at all.