Bench Bleeding Master Cylinder Question

[DevilDog Aggie]

I know the procedure for bench bleeding the MC. I had a thought over the weekend and wondered if anyone had tried it before. My thought rather than having to release and cover the ports when pushing/releasing the piston, would it not be easier to put the MC into a "bath" of brake fluid that covers the ports and do it that way? Then you don't have to worry about air being sucked back in. The bubbles would float out on the push and clean fluid would be pulled back in on the release. Just keep repeating until no air bubbles are coming out?

I know the MC will be covered in fluid when done, but clean up is easy and brake fluid is cheap.

Pros/cons???