Which MechJeb part do you use?

[Oddible]

I see that Scott Manley uses MechJeb in many of his videos but I can't tell which part he's using, it isn't obvious or visible, which is weird because all the MechJeb parts seem to obnoxiously huge to me. I'm curious which MechJeb part folks typically use to keep things out of the way, symmetrical, and visually pleasant.

[Benie]

I use that little control box with the two lights on it, with all of my space-going ships.

[AlexanderB]

Pretty sure Scott Manley uses a mod that integrates the mechjeb functionality into the command pods / probe bodies..

But same as Benie above me, I use the AR202 case with the 2 lights on it.