I tried to silver solder 416 stainless bolsters to 416 liners on a slipjoint (my first try at a folding knife). I cleaned everything up really good and used Stay Brite flux that came with the silver solder and clamped the bolsters to the liners with tiny vise grips and soldered. I saw the solder pulled all the way to other side and there was a nice little line of solder all the way around, so I thought everything was fine. I put both liners together without spring and blade in and began to sand them both down about 1/16" or so to my finished size scribe mark and one of the bolsters came off. The solder had only flowed around the edges. The center where I had it clamped had no solder at all! I looked at and tugged on the others and another one was loose so I had to drill and pin them on and that was no fun at all. In fact it took me almost all day to do! Is it possible that I had them clamped too tight in the center and the solder couldn't get in there? I have no real experience operating a mill or lathe, but I do own a Shoptask Mill/Drill/Lathe combo machine. I am a self taught "farm boy machinist" and can make a pin or simple part for a disc or shredder without putting out an eye, but that is about it! I think liners with integral bolsters would be much better, but with my skill set I am not sure. Any suggestions on how to proceed?