I think I posted in your last post.
I had a successful version - same positive indicators as you (save for 2nd baby, not third).
My doctor said that she had never had a problem or needed to perform an emergency c-section when doing a version. I trusted her. they watched the baby on ultrasound the whole time. She only tries 3 times - she figures after that, the baby does just not want to move.
Best advice: relax it makes it easier for them to turn the baby. It definitely was not a comfortable experience, but it was not unbearable or anything like the horror stories I have read.