Been working on the banjo G to C transition lessons. I wanted something to help me with timing, so I took a tiny sample out of Ben's Bugle Call Rag guitar rhythm track and set it up so it's a perfect loop. Each time it loops, there's just enough time to work in one of the G to C transitions before you hit the C, then it goes back to G for 4 beats, then loops.
It's been a great practice tool, and since it belongs to Ben, I thought I'd upload it here. You just need a player that will seamlessly loop the MP3 and you're good to go.