Since 41f, there is no CLEO signoff (at least at the federal level). There's a CLEO notification, but thats it. And now, every person who is on the trust must submit fingerprints, photo, and RPQ.
The way I do mine, I submit a form 1 or 4 with my trust and an amendment that removes everybody besides myself from the trust. That allows me to only have to submit my own fingerprints and photo. Once the stamp is approved, I shred that amendment and everybody else is back on the trust.
I prefer it this way, is I gain all the benefits of having a trust. My wife is protected in the event that she needs to have any of my NFA things when I'm not around. God forbid a bad guy brakes into the house and the closest gun to her happens to be a 2-stamp SBR with a suppressor on it and thats what she uses to defend herself. If the guns weren't on a trust where she could possess them without me around, we could be looking at some costly legal bills. The small price of the trust and the extra few pieces of paper I have to print out when I file a form 1 or 4 is worth it to me for the benefits.