RomAnOCrY, I'd appreciate it if you can confirm these;
- Playing the same games while using different MicroSDs: To show you can play something like Pokemon X with 2 different saves.
- Load a few games first, run it, then load a few more: To confirm whether or not you can only load 1 time up to 10 games, or as many times as needed until you reach 10 games.
But I would understand if you would rather not take a risk on the second option.
Please let us know as much as you can, thanks!
He can't test it at the moment, his 3ds needs to be on the latest FW 9.x to run it. He will needs some time to sort things out