The main thing to get accustomed to is the higher speed at which
things happen when using an oxy torch. The flame has to be moved at a
high speed over the surface of the metal when preheating, and the
final concentration of heat at the joint when the solder flows
requires a keen sense of when to RUN!!!..(withdraw the flame at high
speed as well). A touch too long and there is porosity in the solder
or melting of the parts.
Next is the size of flame and the intensity of the mix of oxy/gas
for the job at hand. Both can be adjusted independently, so practise
is the answer because there is a new variable that can be controlled.
The intensity of the mix determines the oxidising/reducing quality of
the flame. Thus you can have a soft reducing flame vs a hot oxidising
flame vs a small or big flame all from the one nozzle.
When using the pick, the heat beyond the flame is sufficient for
picking up pallions and placing them. My titanium pick gives a
spectacular surprise if I let the cone of the flame touch it and I
avoid that at all costs. If it happens then extra work in grinding
the point of the pick is expended before I can continue.
The weight of my oxy/acetylene handpiece is about the same as my
gas/air handpiece. One remedy is to support the hose as a point where
you are lifting the minimum amount of hose that gives sufficient
movement at the soldering position.
All the best, Alastair
For day to day use I prefer my air/lpg burner to a mini-torch,