Charlie,
I found that drifting with no or little lead tends to drag the bait on the top of the water so do you add more lead when you drift?
Only times I've been drifting has been with heavy snapper leads/paternoster rigs.
Lately I've been using a 2 hook ganged rig (1/0 top hook, 2/0 bottom hook Gamagatsu Gangsters). I find the Gamagatsu tend to have too long a shaft but what a sharp hook. I use one hook rigs for the kids and missus as I always afraid they may get a hooked when a fish is head shaking when it is boarded.
Cheers
Ivan