BL Touch

Hello I have x2 ender 3 pro and x1 ender 3. I'm looking to buy one bl touch and one 3d touch just to try them both for fun. Has anyone installed these before? Do all I need is the kit? Some guy said buy the skr mini also.. is that needed or just because? I don't want to add tooooo much because I see alot of people that have issues they also have alot of after market parts lol..

So back to main question... If I just buy a bl touch kit and a 3d touch kit is that all that's needed?

Side note - I am buying the skr minis just to have them.