Eggplant: single or double stem?

[jtjmartin]

I love growing my tomatoes by lean & lower with baling string and plant clips.

I know I won't have to "lower" my eggplants but I'd like to use the same method. A couple questions to those that use twine and clips:

1) single, double, triple stem?
2) spacing between plants?
3) how do you like this method for eggplants vs. wire cages?
4) other tips

Jeff