Let's see now. You were asking about components, as I recall.

As a part of the massive component changes I went thru to get our front brake working both satisfactorily and quietly I went thru 3 forks, one of which was the Wound-up Duo tandem canti fork.

I was impressed with the strength/quality of the fork, and would not hesitate to put one on another bike. It didn't work on our bike because the Trek T-2000 has been described by some as being very "Santana-ish" .... which is to say "stable" if you like that feel, or "sluggish" if you don't! Regardless, the frame is designed to have a fork of a particular rake and trail, and the Wound-up made our bike feel twitchy. Put it on your Speedster OR your new Seven and I'll bet it would track beautifully.

Personally though, I would want to talk to Seven directly, give them the handling/braking parameters you're looking for, and take their advice. My best guess would be that if you are used to / comfortable with the handling of a Co-Mo, the Seven with a Wound-up would be very similar. But they're the ones with years of info of their own as well as feedback from other knowledgeable customers as to what works best on their bikes.

I was hoping Tandemgeek would chime in here as he has a lot of experience with the various other carbon forks out there on a variety of frames. You might want to contact him directly from one of his sites, either http://www.thetandemlink.com or http://tandemgeek.wordpress.com/