Hi, It is strange that you should bring up this topic at this very moment, as our model traction engine club had a meeting last night (Friday) to discuss these very regulations. Most people seemed to think that they were very reasonable and that a 500 bar-litre boiler was a very large one. I didn't hear anyone complain that it was going to be difficult to measure the total volume of the boiler (in litres), as I had expected. The most discussion took place over the requirement to have the cladding removed at various times when tests were conducted. It was felt that if the paint was to flake off during this process, particularly if the cladding is brass, to which paint does not adhere terribly well, the owner would be faced with a considerable re-painting job. When you realise that quite a lot of model traction engine owners are not themselves engine builders this could represent quite a considerable hassle. Those with a copper boiler felt particularly unfairly treated as they saw the main reason for removing the cladding was to expose corrosion in a steel boiler. I think several people, whilst they had injectors fitted to their engines, had never been able to get them to work satisfactorily. They had always relied on the mechanical pump, which of course can be brought into operation with the engine stationary, by putting it in neutral and setting the 'works' to "tick over". It looks as though they will have a busy couple of months getting their injectors to work. We have agreed to have a boiler testing day in mid-March, so I will be able to report back after that date as to how the new system worked. We live in interesting times!! Cheers, Roger Mason, in St. Agnes. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.