Quoted from OLDPINGUY:
New or replaced Targets?
Nice Idea...might help some people on GB?
These are original targets on my Shadow.
I have a ghostbusters and tried the same thing, but the support brackets have an L shape instead of just flat so the post rubber wouldn't fit. I had to buy a little larger clear tube and did essentially the same thing. It seems to be helping GB, but because my clear tube isn't as thick or as bouncy it's not quite as good.