Where did you get the longer shaft and what exactly do I look for to upgrade my ELF to a 30" shaft?
8mm shaft threaded for 6 mm at both ends was available at DEMA
A fellow on Bonaire had some with a coupler (female both ends) and a stainless bolt (6mm) which hold the spring in place and the butt to use the tool
I don't use this anymore due to the short sling of the spring. Get the yellow fiberglass shaft spear and then get a 6 tip spear point they are better than the ELF and leisure Pro has them on their website. I shot over 200 lionfish this year and I can tell you for sure the yellow fiberglass shafted sling type spear with the 6 point spear is a far better more accurate and further range spear for the Lionfish.
I believe the 30" shaft upgrade was available for the old style elfs. I know there is a guy on Bonaire that has the longer shafts, Bas Tol. I do not think you can buy a new one with at 30" shaft.
I had a machine shop make it
i have found this to be a second class solution we have found the various pole spears in about 4 ft length have better range and more penetration
I have gone to an 8mm shaft (steel-less) (7mm bent for big lionfish)
as the longer shaft has more leverage than the shorter ones, but get into holes the lionfish hide
The shaft is threaded 6mm to fit the standard 6mm tip and the butt
( after the upper handle hole is enlarged for the shaft) is attached with a stainless 6 mm nut or better a 3/4 inch steel-less spacer (threaded both ends 6 mm). (one end holds the shaft and is kept in the spring and the 6 mm butt end of the spacer keeps the end butt in place by a 6mm bolt (and the knob end is not enlarged to keep the bolt in place.
Shafts were available at DEMA, and at machine shop
might find it on line
I would not buy that particular spear for lion fish. I had that one and had trouble with the bigger lion fish and also missed some smaller ones. They make a trident spear it has 8 points on it and surrounds them. It has a yellow 24 inch rod. Where do you hunt them?