I have just fitted two new Gaslow hoses from the cylinders to the regulator. I noticed that what look like a crimped collar on each end of the hoses where the metal parts meet the plastic outer casing, near the connecting nuts are fairly free to wiggle about although they cannot be moved up along the hose itself. I have tested for gas tightness and there are no leaks. I suspect the crimped collars are there to stop the hose being over kinked as it enters the fitting. The same crimped collars on the filler hose and the hose connecting the two bottles are the old style, fitted about three years ago, with brass nuts and the collars on those are solidly fixed. I was just wondering if this slight movement on the new chrome finish connectors is usual. Anyone noticed similar?