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Join Date: Feb 2010
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yankee_cop - welcome to Flyertalk and the BA Forum, it's good to see you here and I hope we will see more of you here.
The issue about baggage is fairly robustly confirmed. Your plan can only reliably work if you are prepared to go hand baggage only. SFO have form for checking bags all the way to DUB regardless of what you may ask for.
The rest is more in the conjecture / direction of travel stuff, but it's not looking good for those who drop the last leg. I would not recommend doing a fare like this unless you are prepared either to do the whole trip, or live with the consequences.