Did that s410man, it was dropping fairly quickly before I found the small leak at the peashooter gauge connection. Every joint fully tightened now and leak checked, gauge does drop, but much more slowly now. New bottle fitted, will see how this one goes. Also will reduce flow to around 6/7 lpm. Agree re gas requirement for acceptable welds. Tried going as low as 4 lpm on indoor welding, and no porosity.