Just copying in a previous post from Jul 2017 and a recent follow-up regarding the Spyderco Fish Hunter (posted on a different thread):
Just picked up my Fish Hunter at the knife smith's. The hole got a bit larger than I wanted, 8.5mm, but it should do the job with the spear.
With the plain edge, this knife should be handled with outmost care. The smith rounded of the point just a tiny bit, let's see how it works.
I'll initially try the knife in the elastic diving belt as shown. I'll also experiment with 3mm elastic cord and velcro bands + zip-ties for calf/arm attachment.
The smith said he struggled with the H1 steel, the more he worked on it, the harder it got. In the end, he damaged one of his milling tools. He jokingly said the steel must have som magic properties.
Thanks for the comment Sal. I think the Spyderco Fish Hunter has the potential to become the best spear fishing knife out there!
I'm looking forward to trying the knife in its right element...
Just thought I would pop in and give a short feed back on how the Fish Hunter(s) are holding up.
All in all, I am very happy with the knife, one of the best spear fishing knives in the market, probably the best with a few modifications in my opinion.
a) Plain edge back: To me it is very important to have a plain edge on a knife, it cuts cleaner, works well with in-the-field filleting and it makes penetration of the fish easier. So I am very happy I made this modification.
b) Oxidization: I am very impressed with the H1 steel, not a single spot of rust after many many long days in salt water.
c) Hole for retraction of spear: The way I did it compromises the strength of the blade too much. If this feature should be included, it should at or near the centre of the blade where the material is thicker. However, it is not a critical feature. One could ask if there should be a hole in the blade at all...
d) Sheath: "As is" it is not good enough. After some use, the "lock" gets worn and the knife slips out too easily. For diving, you must use a lanyard, or better, an elastic to attach the knife to the sheath. I use a round elastic around 30 cm long tied to the handle and to the upper hole in the original sheath. Further, I mount the sheath with one diving strap or two round elastics on the upper part of my forearm with handle facing the wrist. Like this, you can easily work with the knife and put the knife back with full visual control. You do not want to miss the opening of the sheath and slide this knife in where it does not belong... For me, keeping it in the belt is a no-go (also keep in mind the reduced angle of vision in the water and through a diving mask). When using my first knife (pictured in my previous post), I did not secure the knife to the sheath and I lost it. This was 14 months ago, and it is still in the Atlantic Ocean:). If I find it someday, I will share with you an update on the H1 corrosion resistance:). A second knife, I gave to my father, and it is still holding up well. My third is now at the knife smith's to set a plain edge on the back. I will not modify the hole this time.