Board flipping is just logging out of whatever mode you are in and logging back in under a different mode - right? Isn't that what 99% of the players do when they are farming the Guardian tech.
There is a big difference between logging out of Open and then back into Open in comparison to switching between Open/Solo because the Open/Solo switching is the only way to reset the mission boards. Otherwise if you just log in and out without mode-switching the mission boards take a certain amount of time to refresh, generally 15-20 minutes.
If you are simply farming Guardian tech or other mats from bases you just need to log back to the main menu and then return to the game and it will reset the mat drops and NPC spawns even if you return to the same mode. I fly exclusively in Open and have never entered Solo but I can reset the bases all I like just by logging out and back in. It was the same when I was doing Palin missions, I would log to the main menu and back in but I always logged into Open and the mats around the Thargoid Scout would reset. Simply resetting an instance requires that you logout to the main menu and is quite different than trying to refresh the mission boards.