Your not crazy RH, both of those things have been discussed here at some time or another, and I think it was recently too.
I remember Otto talking about the narrow sheepsfoot roller too. His description was similar to what I have seen used with a trackhoe. It fits on the end where the bucket goes, and is moved around into places where its to steep or narrow for a regular sheepsfoot roller could go.
But for size of core, call Otto as already recommended. He should be in the resource section.
..Jim
