I'm continuing with this project, now working toward tomatoes grown in unheated hoophouses for the early market. At this point I have several S. habrochaites crosses with good cold-tolerance (down to 25-28 F several nights in a row). Two also have excellent fruit set and flavor. They are both large cherries, shown below. I plan to slowly increase the size by crossing back to Sasha's Altai or others like LA3969, 0-33, and I-3.
I also requested some seedstock from GRIN which should arrive shortly. It includes high brix lines, two more accessions with the (sucr) trait, and a few ultra-early strains like Beaverlodge 6714.
A discussion of germplasm available from GRIN probably deserves its own thread. I know several of us have taken advantage of that resource and could share information.\