There are others much more versed than me, but 3' sounds really short for a bowsprit. I would also wonder on the benifit of having the inner forestay 2' fwd of the stem vs. directly on the stem which is the most secure location. The bow sprit is all compression load so there needs to be considerable thought into the fitting that recieves it on the boat. Just a suggestion but for something like this your best money would be to sit down with a NA for a couple hours and look at the most efficiant placement of sail area to get the windward performance you are after. If dual headsails is the answer then there may be a simplier fabrication solution on your stem fitting that will get you there without nessesitating a full on bowsprit with associated rigging, bobstay wisker stays tangs on the boat that all have to be re-enforced etc.
Jake
heres a pic of what I think is a
sistership for a visual