Sounds pretty impressive, I'll have to get some of that stuff!
On my spear, I went right to the most extreme method by cutting out small rectangular shaped slits directly into the shafts of the tripod legs and designed each of the patterns for the individual blades base areas to protrude slightly so when the blades would then actually fit inside the slits I'd cut into the tripod shafts, basically connecting directly into the shaft itself, similar to the way a key fits into a keyhole or like a routered dovetail joint fits together. By doing it this way, the blades were far less likely to break off from the spears shaft because the blades weren't just adhered onto the surface, but rather fuzed directly into the sides of the shaft which made the blades incredibly solid by essentially becoming an extension of the shaft itself. It took a lot of detailed work to do, but well worth it for the incredible amount of physical strength it'd created in the final outcome. Like I've said before...I think waaaay too much about every concievable detail whenever I design something totally original, such as my spear. The way I had attached the blades was just one of those few concepts which happened to pay off really well for me in the end.