Been looking at these as we just have the one 6kg bottle at the moment and being new to the van plus it having heating I'm not sure how fast that will run out? Then weighing up cost of another bottle and exchanges against refillable systems. Found two, but there is a big difference in price, not sure if there is a quality reason for that? One is Gaslow at £466 and he other Gas-it at £303. Both are twin 11kg bottles, manual change over, filler point, pipes plus bits and bobs. Is there any real difference between the two kits for the extra £163?