Personally, while I'm ok with presenting, I'm more of a fill in the gap guy. You said in your email that it may be better to have maybe up to 2 people give the majority of the presentation while the other 2 help answer field questions and fill in the gaps. That to me, IMO, would be the best way, as I agree with what you said, that 4 people giving a 10 minute presentation might sound a little weird???? I haven't given a TON of presentations to know that though haha.