This is just my opinion, but I would let them both work on something. From my understanding, as long as you don't agree to a modification from the lender, the NACA will still work on your behalf. The NACA told me that I could continue to negotiate with
CW because it is always good to have a "Plan B". You know what the NACA is proposing, so why not see what
CW has to offer. I doubt it will be better than what the NACA can do, but you never know. I wouldn't sign anything from the lender or agree to only utilize them. If they request that, then I would just let the NACA work it's magic.
Again, JMO.