I've been thinking of trying it for a few years, and this may be the year. I'll give my planned setup and anyone with experience, please let me know how I should proceed:

Approx. 50 plants of beefsteak size heirlooms, many varieties. My market is med- large toms in all colors. I will succession plant to an extent for longer production. These will be in large nursery containers, approx 25 gal. with a mix of potting soil and compost on an automated drip irrigation system. I would like to increase yields of fruits, and I understand grafting will help that. Disease shouldn't be as much of an issue with containers (I hope).

From what I understand, there are vegetative root stocks and ones that are more for fruit production, with different guidelines for different sized mature fruits.

With an eye to increast yields of large heirlooms, which rootstocks would you recommend?