talk about everthing you say will be taken out of context and used against you! and now there are legions of leprechauns helping "da cause".
Anderson, i was thinking of using aluminim, but a short spike, so that it only projects about 1 or 2 inches. over that short length the aluminuim should still be strong enough and hopefully light enough. if its still too heavy, a cork or HD polystyrene speartip cover may help keep it neutral, but i dont want to cock up the trackability too much.
about fixing it, thats my big problem. I have seen a raingun with a reel attachment and they (the dive factory) screwed a plate onto the barrel, so when i get a chance, 'im going to head over there and ask them about seals etc.
I was thinking of placing it on the side where the mono is pulled over the rubber, so you just have to make sure you load it with the line down the right side.
Skin, the clamp is probably the best idea, but machining the rail

. still, i may have to go that route. do you have any idea if it still floated with a stringer shaft? an you said that it worked? what did it work on?
we had hasstles with a raggie as well at 1/4mile. it had decided that we just werent welcome on his reef. my budy had just shot a pickhandle barracuda. he saw the shark when it was three meters away, just after stringing his fish, and ended up trying to push it off with the gun muzzle, while the spear hung three metres below him. by the time the shark was comming back for the third try, i had swum over and stuck it in the head. still, it took another three returns and three jabs, before it pushed off.
it gave the scoobies something to think about because "they just love raggies, they're so mellow".
cheers
mark