Stringing Indeterminate Tomato

I planted tomatoes in the SFG for the first time this year. I am an old row gardener and have tomato cages (Texas Tomato Cage - 24 inches in diameter). I used these cages this year for my tomatoes. Needless to say, they took up 4 sq ft per tomato. This is a huge waste of space so I also tried pruning and stringing some of my tomatoes. This method is working very well except for one problem. As I wrap the tomato around the string (or the string around the tomato), the string begins to get too tight. I had to cut the string and add another length of string in order to keep stringing them. I have watched the "Frontporch Farms" video a number of times and watched other videos, but no one ever talks about actually setting up the string. My main question is, how do you determine how much slack to put in the string so you can continue to wrap the tomato ??? Or do you make it so you can keep letting out more string as the tomato grows???:scratch:

Also, can someone tell me how to get a new topic in a specific forum. I did not want this topic in a regional forum but in the SFG General Discussion forum. Did I miss a step when I started the topic.

Camprn - Thank you. Yes it makes sense.
Michelle - Yes I was in the Tropical South subforum. Next time I will get in the forum I want to post into.

I tried some of my tomatoes using the string method. I made a mistake and did not prune properly. Things got so heavy that some of the strings (twine) broke and some of the tomatoes fell over. Next year I will use that string that they use to bail pine straw or wheat straw. Also, my height of the poles started out at 5 feet tall. I had to add a five foot extension. That still was not high enough and I added another two feet. The structure is now 12 feet tall and the tomatoes have grown above the top.