Looked them up and it looks like the bibb and great lakes are both a type of head lettuce. I don't think either one would do good here. Might get one or two cutting a year as you do, but I don't see them producing in the summer time. We plant the green leaf and red sail. This year my green leaf seems to be doing good, the red sail not so much. We don't do rows, we just scatter/sprinkle the seeds in the bed and then pat into the soil. Actually, my big foot presses the seed into the soil. The red sail and green leaf will bolt and if you want to save the seed, then that's ok. We just cut it back and this encourages new growth. The lettuce that bolts turns bitter, cant eat it so might as well clip it off.This time I planted Bibb and Great Lakes lettuce, it's in a big planter box next to the patio and we have never seen any rabbits in it eating it until this morning, I look out and see the same rabbit eating some that I chased from the tomato and pepper raised garden bed last night and the day before so that one is a problem!! But yes those were some great links, and I read that Red Sails is a good one that can hold up to the heat and I have planted that before and it also mentioned shade which you said too, and this doesn't get much shade so that also is a factor.