Do these jaws have a groove/s in them, or are they smooth?

I am concerned about using them on Tiemco's SP-BL hooks, with the "spade point". Do they avoid smashing the spade?
I'm generally tying size 20 to size 8.

I'm also weaving czech nymphs. I assume the swivel on the Medallion does "upside down and low"?

Any other issues to consider?

Thanks.

Greg