Hi all I went to my lfs today which is oasis in broughton I have got a co2 fire extinguisher and my old reg will not fit they told me that you can get an adapter but it is the wrong way round for what I need so they tried to sell me a regulator with twin readouts one controls pressure one controls flow it is £31.99 and I asked about a solenoid which they have in stock for £51.99 are the prices about right or a rip off I got a cylinder regulator and bubble counter for £89.99 but it is only 576 grams and £15 a refill so on a 200l tank it's costing me a small fortune the fire extinguisher is free and I can have a new one for free whenever I need it but £80 quid sounds expensive for reg and solenoid can anybody help plus has anybody looked into making a solenoid from a gas valve on a boiler