I did sign up for calckey but I was unable to figure out how to get the Advanced Web Interface that I'm now accustomed to in the regular Mastodon browser model. (I use my laptop, so I have a big screen.)
I did see that I could add columns but the four columns I have with AWP — entry/search, Home, Notifications, and the wild column — I could not replicate.
I might try it again at some point, but right now AWI works well for me.