>"Anybody else got an opinion on this?"

i agree. i use a #2 tip with a hot flame for
most applications. the flame must be at least
10" long for those interested in such facts.
furthermore, i think the learning curve to
better brazing should include mastering "brass"
first before ever tackling silver alloy rod as
the filler of choice. brass brazing, especially
on frames, allows the brazer to work through all
the temperature ranges and learn how to control
heat, flux, and filler simultaneously. it can be
a daunting task, but when learned, makes silver
brazing quite simple.