MANY thanks to all who weighed in on this. The pros and cons are very clear, and very useful to us as we go deeper into our search. I'm glad I posted the question and am grateful for the thoughtfulness put into answers. Let me ask, for GB 36 owners with either a single or twin: What is your gph at 7 or 8 knots? I understand there are other factors that affect this but would appreciate seeing what you have experienced.
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