The posts from January 2021 from this thread offer useful information from @rybu about a clever setup to to empty the tank.
I think that one downside of emptying the tank is that you mess up with the tank statistics, so you need to do it manually. But this has to have some positive effect extending the tank lifetime if you can live with carrying out the chore.
Murphy’s law says you will need to print with THAT resin the very next day you pour it out 