drossall

A 4kg roll of copper silicon bronze wire will probably set you back upwards of £160, on top of that you will need a decent machine to run it, I had SAF synergic set with a proper program in it, so its likely that trying to use a basic welder will not end well. You may find it cheaper and less frustrating to just recruit another pair of hands to position and hold the parts in place while you braze them, tig brazing would be ideal for this.