I did something similiar to you, Chris. Several days after my H moved out the 4 or 5 things he took, I asked him to help move on of our children home from school. We had a long visit en route home with her things. The following day I helped him move her things into his new apartment. I had double ulterior motives in getting to be part of his new home and in avoiding having him get too commited to his new home with new furnishings and expenses. I wanted him to be able to come home without any reservations or interferences. He so appreciated my superwoman efforts at dragging in the heavy couches, chests, mattresses, etc when I was in such despair that I frequently had to take time outs to throw up that he agreed later the same night to return home the next day - and did.
At that time I didn't know about ow who happened to be out of town that week. He didn't stop seeing her then, but that definately was the turning point for us! I had been dbing for about 4 months at that point. I do think that super effort at niceness and the apparent lack of resistance helped him to begin to see that perhaps I was someone he did not want to lose. It's really strange with all the things we do to try to save our marriages, which ones seem to have the most direct effect.