I've already done the non-drive side and got a snail cam on that. I cant do the same for the drive side because the axle is too short, and would barely sit in the frame if i used a snail cam. And i'd have to force the frame apart, which i dont like doing.
I doubt i could use a snail cam on the outside either, for a start it'd be pulling against the bolt rarther than the axle, achieving very little. And the way the dropouts are shaped, i doubt it'd fit