As for the twisted stems, I'm not sure, but I was always under the impression that they would compete for root space. I suppose it's possible though.
I googled it a few minutes ago because of another thread.
YYYYEEaarrrrrrrrrgghhhh pppptthbbbththtbbbbthth bbbllechhh!!!!.......I need to brush my teeth.....and pray.
I'm not even religious.........