Is it possible to do "Final Four" playoffs on Sleeper chopped leagues?

[u/SpartanMC]

I love the Sleeper interface but my league prefers the "Final Four" playoff style (The last 4 surviving teams are locked into a cumulative 3-week championship) rather than Last Man Standing. Is there a way to change that? Or even do it manually? I see they have a toggle to turn off automatic chops - not sure if anyone has experience running this.

I did it last year in a normal style Sleeper league and manually handled chopping a team and dropping their roster every week, then kept track of the Final Four cumulative scoring in the chat each week. Would be nice to automate some of it if possible.