Smoke73,
That 6% silver 94 % tin sounds like it is very close to the Hi Force that I use. I should be only using it to put the spacers and barrels together and then soft soldering everything else, but the stuff works so well, I just use it for about everything. I tin everything first then just sweat them together. I have also used 60/40 resin core to do ribs, it came from a computer store. It is made for doing electrical connections. It flows very well. Bob