I have had all my gas supplied today . didn't realise there wood be so much . I have a tank of liquid oxygen in the garden to fill up the two portable units I have too carry around with me . plus a cylinder I have to carry in car in case my portable ones don't work . then there is the concentrater up staires with a long line on . plus a cylinder in case that don't work . oh and a cylinder down by back door . in case outside tank is frozen . it all seems a little bit over wellming at the moment . tomorrow I have to meet my boss at work to talk things over . have to see if I can carry working . heres hoping .