It's cheap, it's springy. Basically a few help files smashed together but it seems to do the job at sounding springy and grungy.
Only problem I seem to have is that unless I move damp up to 0.99 after playing the echo's never decay, they just build up in the low end and steal all my headroom.
So I guess it's a share but something to be built on and developed.
Have some springy fun!