Very nice work. The Slatz Randall bunch was originally formed in NC and played around Asheville the summer of 1927 before migrating to the Twin Cities in 1928, if you were wondering why they are so good! I could be wrong about those years, but close to that at any rate.
I didn't realize Hoop 'em Up Blues was first cut by Dick Long's group (a group I've never heard of). I'm used to the West Coast version by Curtis Mosby.