We bought our first motorhome almost a year ago..loving it. When we bought it from the dealer, on the handover they were surprised to find it had been converted to use refillable lpg tanks..which were full. One tank is now empty and the other has been used quite abit..however the dial in the cupboard has not moved, and can someone please help me to understand how to refill them? I have read garage forecourts dont like you doing it? We have an external filling point..but I have no idea where or how to do it. (feel very silly)