Thanks, that's very helpful feedback. I've been meaning to buy a pano head for some time, but still not sure how extensively I'll end up using it, so given that I have an opportunity to buy the 3 used for a decent price, I may still go ahead and then look at upgrading to one of their new models somewhere down the road. I'm thinking I can probably sell the 3 for about what I paid for it at some point in the future if I want.