Welcome
Phox Congrats on your mystery box purchases
So, as
Malik stated above, the MHS system allows you to change the saber's physical look by swapping out pommels, emitters, etc... Additionally, the
Ultrasabers Launcher is a Windows/Mac compatible app that allows you to manipulate the light and sound settings of your saber, provided your saber is equipped with the Emerald LED driver and/or the Obsidian v3 or v4 sound board. If you don't have a programmable LED driver, but opt for a quick disconnect connector in your build, you can swap out the LED unit with relative ease to change colors of your blade.
...at least, this is how I understand all of this, cuz I'm new as well
Mystery boxes are a great way to dive into the whole saber world, just to get a feel for the quality, etc...but if you're like me and want precisely what you want, definitely try a custom build when you can - very fun, very rewarding.