Yeah, so it comes with the medium pad, my mistake.
I have a Bosch 1370DEVS that I've put into the equivalent of rotex mode permanently, and have a hard pad with protector(s) for it, so that'll take whatever heavy duty removal tasks I have. The ETS EC 150/5 will be for smoothing, so I'm actually thinking the medium pad is probably perfect for most, and maybe an interface pad in case I'm working on rounded edges and the like.
Unfortunately, my protector pads are not for Festool's hole pattern. I briefly played around with trying to redrill them, but they don't drill cleanly and it's just too much effort. So, I'm buying protector pads and an interface pad for now.
thanks!