After getting a quote on a Selden Bowsprit for my Frers 36 of $961 (w/o sheets or tack line), I'm building my own. 6' of 6061T with 1/4" wall diameter. I did buy mounts from Selden, bow roller not big enough, and canted to port. Previous owner removed babystay from foredeck, so plenty of room. Found an article in SAIL that had a 'sprit on Tartan 31. Dude was an engineer, so he had already calculated load (1782lbs of pressure, asym was 482sf). I just doubled (mine is approx 900sf) and added 2000lbs. In theory, it should work.
Tired of needing 8 crew for spin. I found a J105 racing video that showed crew of 5 in pretty heavy conditions flying aysm. So, what the hell, if it breaks (boat or pole) so be it. At least I tried. Will post photos when completed, under way, and any unfortunate results