First screen shot here:
 
http://blog.cakewalk.com/anatomy-of-an-fx-chain-vintage-wah/?utm_source=bronto&utm_medium=email&utm_term=Read+on&utm_content=Upgrade+TH2+for+%2479+-+Free+Vintage+Wah+FX+Chain+-+NAMM+2014&utm_campaign=Jan+17+2014+-+X3+Producer
 
Is this a Sonar FX chain, or something different?

Yes, it is an FX Chain. this image is what it looks like when opened from an FX bin:

Thanks for the response. I couldn't figure out how to "open" an effect chain. Is there a trick to it?

It works just like any effect. Drag the FX chain into the FX bin and the UI opens just like any effect. After closing the FX Chain UI, double-click on the entry in the FX to open it again. Again, this is in the FX bin NOT the ProChannel. FX Chains in the ProChannel are locked into the ProChannel like all the other PC effects.

Thanks scook! I always use the pro-channel, so that explains why I didn't see the nice looking UI! :)

I'm glad you're seeing it, I put a lot of time into making the UIs look nice

Looks great! I wish we could fly out the FX Chains in the Pro-Channel like you can the EQ, so we could have the full size window like what you created...