How many more Columbia series do you have left?
Let's see...
Andy Clyde (11 shorts available)
Hugh Herbert (5 shorts available)
The Glove Slingers (2 more shorts still)
The Mischief Makers (1 short)
Joe Besser (the 4 remakes that weren't reviewed)
I had many more Vera Vague and Polly Moran shorts lined up, but those videos all got pulled and have never been replaced. As you know from the master list, there are a 50+ shorts that just have no video available online. There is also a Harry Langdon film that is sometimes considered to be a Columbia short, although it's really a government PSA on the importance of following traffic laws merely produced in co-operation with Columbia Shorts.
If you have any Apple device, I can PM you the master list I have been using to keep track of things.