DYI wrote: You won't be able to get an output of more than 14 psi out of that oxygen regulator (I've tried it). It is relatively simple to modify that regulator to be capable of output pressures of around 70 psi, but you shouldn't need to do so for this design.
The quote from DYI is from another similar thread.
Can anyone verify the output of a standard oxygen regulator as come in the torch sets from Home Depot etc. ?