In saving tomatoe seeds----for your own use----you probably only need the seeds from one or two tomatoes.
So what you can do is:- bag one blossom cluster just as it forms.
Mark it with a tag or tape etc., and remove the bag once the small tomatoes grow.
This same idea could be used if you want to make crosses.
Bag new blossom clusters on both plants, and use a brush to move pollen from one to other.
Probably good idea to remove pollen possibility from the one first. (I think the Male book tells how to do it.)
