The refillable oxy cylinder was part of the kit - it is complete
with gauge and regulator, and can be refilled at any British Oxygen
depot, but better still, you can purchase a special "umbilical cord"
from Microflame that allows you to decant from any standard oxygen
bottle. A full bottle lasts me a couple of months.
I found the disposable propane bottle not too economical and
replaced the connector with an adaptor that fits the standard Calor
Gas bottle that I still use from time to time for driving my Sievert
torch for annealing.
The smallest tip is not too useful because its extremely difficult
(read just about impossible) to light - its intended for acetylene
rather than propane. The next one up is still hard to light, but
doable. The blue part of the flame is less than 1.5mm long and 0.3mm
wide - the orange part is about 7 x 1mm. I also bought the “swan
neck” and associated nozzles, which is extremely useful for melting
silver, gold and platinum. At one time, several years ago, I had a
really hard time getting my oxy bottle refilled (I have a long drive
to my nearest BO depot), so decided to supplement the Microflame gear
with a water torch. In case you don’t know about water torches, they
are devices that generate oxygen and hydrogen from water. It is
basically a box that contains some water and a lead that connects to
an electrical socket. There is a single tube to a small torch that
accepts little hypodermic-type tips. You just switch the power on,
choose a tip, and light the flame - the correct mixture (2 parts
hydrogen to 1 part oxygen) is supplied automatically and cannot be
altered. The valve on the torch is really used as an on-off switch
because the flame size is determined by the tip. The smallest flame
is even smaller than the Microflame (about 1/3 the size) and is very
easy to light. Also, there are no gas bottles to store.
I confess that I now use the water torch for almost all my soldering
I hope this helps, but please contact me if you would like more
Regards, Gary Wooding