John,
Pine is the best if at all possible, table saw a length from a plank, and then there's the broom handle. Takes a bit of work with a plane and draw knife but at least it's in one piece. I have in the past made masts by glue 6 lengths of pine beading together into an oblong profile, and then worked it down to a nice tapered flared squashed oval shape as required. On that mast I also had to whittle the spreaders as they were of wood as well.
There's nought to stop you using aluminium for the mast, just get the thick walled type about 14mm diameter. It's a pity we live far apart, with two sea crossings between us, as I have second hand Al masts here that came from a Marblehead, I'm going to build a wooden mast for my marblehead as I did above.
BTW the method of mast construction was taken from a book titled 'build your own model yacht', and they managed to have it hollow in sections very similar to bamboo.
Gareth, salt water just loves clevis pins, I would get the nylon ones! And I like the temporary r/c fittings, just what I intend on the latest restoration, a 36R so as I can assess mast position and such. Temporary lines to the Braine for steering and sheeting too, just to override any settings made to keep it from the sides and returning to master.
Also Gareth, the Mount Murray Hotel over here has just closed (yesterday) so if you see Paul on your travels let him know.
Aye, Kim