i just read one post, arguing the problems in sse, thats not what i want to get into, altho it was suprising. now, question, i love to grow the heirloom tomatoes, they taste like the ones from my childhood(long ago). but, i grow different varities. would i be ahead to pick ONE from my variety this year, then next, only plant the one variety? by saving seeds from this one each year, would i get tomatoes resistant to diseases here, and better flavors, as they adjusted to my soil, climate, etc?if i'm right, any seeds saved this year, would be mixed with the other varities.