There was a guy on YouTube that came up with some mods for the Gerber Multi-Plier 400, that applied equally well to the Multi-Plier 600. Yesterday I finally found the small washer I dropped last month and finished my own mod tonight on my Multi-Plier 600 - Black, Carbide Cutters, Needlenose. I removed the lanyard ring which I wasn't using anyway, and put a section of hacksaw blade on the far left against the side of the handle, moving the can opener and Philips driver/bit holder over to the right, against the serrated blade. Since a hacksaw blade is so much thinner than the lanyard ring, I had to add a flat washer shim to take up the extra space. I used my grinder to grind down the washer because the diameter was too large. I ground it into a square, since the shape didn't matter. It just had to be small enough to fit. In between the various tools are thin washers with one tooth that goes into a groove just behind the latch that locks the tools open. That's what I dropped and it ended up behind my desk, along with a couple of gun parts I dropped a month or so ago. The hardest part of the whole process was getting the little tooth on all 3 washers all in the slot
and keeping them there while I put the pin through them, the shim I made, and all 4 tools. Then I just had to put the screw the other end. It has 4 tiny dimples that I was able to grab hold of with a pair of lock-ring pliers with a 90 degree jaws, and I Loctited it in. The 4 interchangeable jaws can be assembled to the pliers to open or close when you squeeze the handles. I ground a little off the top of the hacksaw blade for the lock to fit in, and more off the bottom of the blade to clear the latch that slides back and forth. I ground a little off the end too, all the way around. It's not an exact science but by plenty of trial and error I got it to fit.
The blade locks open solidly as it should, but when it's closed it doesn't stay in place like all the other tools. I ground off too much between the latch clearance and the end, so it can swing open partway before it presses against the spring-loaded latch. It should angle down like a ramp, instead of being round and small. If I hold the pliers with that handle up, the saw blade can swing down quite a way. But when I squeeze the handles, it rides perfectly across the curved back of the straight knife blade, and doesn't hang up at all. She ain't purty, but she works, and I can get 4 3" blades out of a 12" hacksaw blade. To sum it up, it was a lot of effort to do the mod, but I replaced a useless (to me) lanyard ring with a metal cutting hacksaw blade with 2 3/8" of teeth on it. I added a whole new level of usefulness to my Multi-Pliers at very little cost.
P.S. My best friend has been carrying Leatherman multi-tools for years and uses his all the time. And I mean ALL THE TIME. He has a garage full of tools but will use his Leatherman for anything he can instead of grabbing a better tool. I can't wait to see what he says when he sees this.
https://www.youtube.com/watch?v=z1uJeVFOa5I