Looks like your on the right track BJ. I have been trying to read up better on this in the past week or so. Seems stemmed points of this general style from this period were made from New England to Fla. What seems to set this apart...Stem is generally longer than others with an "expanding" base, base of stem is straight or slightly concaved, and shoulder is tapered(to the best of my knowledge that is where the stem goes to meet the blade. The angle to that is more obtuse imo). Maybe not the best explanation but looks like the pictures Bob supplied shows that well. I think in the points I made I exarggerated the concaved base a bit on most of them. Looks like you well on you way tho.
Mike