VBAC stories

For those of you that have had a VBAC, and still scheduled a c/s in case labor never started when did you schedule it? 39, 40 weeks? I scheduled myself for 39 and I am currently 38.5 with no signs of labor so am thinking of rescheduling for 40 weeks. I have had a successful vaginal delivery and my c/s was for a fetal defect not my body. I was induced with my first at 39.5. Just want others stories please!