I received the Specialized bag today. Much nicer than the Trek one I had.
I managed to fit a TPU tube, multi tool, mini Leatherman, lever, plug kit, and spare link.
Technically I could fit the small Crankbrothers pump into the bag also, but when I did, I couldn't fit it into the frame.
I always ride with either a fanny pack or camelback, so there's plenty of room for a little pump. Actually, there's plenty of room for everything I mentioned plus a windbreaker and some food. I didn't need this, just playing with my new toy. If it rattles, I'll probably just use it for a tube.
Now this new/used bike also has the EDC cap on the fork. I doubt I'll be utilitizing it, I'll probably go back to the star nut. I don't like the idea of not being able to tighten the headset on the trail.