Quoted from o-din:those nails they put in there next to the Special do pretty much nothing to direct the ball back into play.
o-din, mine has, what I can only describe as "red rubber feet" that seem to be for the ends of a tiny diameter pole poked through the nails between the rollovers which are just big enough to sometimes bump the ball back over the slings if it starts draining from the upper rollovers.
It's fun for me because it is the right size not to guarantee it comes back in and could always use a proper bump to make it happen.
I can take pictures later if you are curious when I'm next to it again.