Your observations of AMS and TW are right, they both have a tendency to hermie. All of mine have, fortunately, they appear to be sterile for the most part. I had one TW so bad in the beginning I had to chop it about 3 weeks into flower.

As far as space between each lady, by the end of flower there was about negative 6" between them. I'll put a couple pics here to show you how much they filled my space.