Yes i can agree with part of what you are saying. I think Crown were the first to put the fan that can blow the truck radiator of and now some others have followed this. But i wonder just how much the new reg have had a effect on this. I know that manufactures don't want to talk about this because it is a major problem that they are struggling to solve and really want to keep this quite. But until this is really opened up and talked about with people on forums speaking about the problems they incur like bb forks has done ,these problems won't be raised. The answer some times to just say yes this is a major problem and many different people could say why don't you try this. Operators should not be relied on to have to do checks because they just don't sometime have time to do it , Yes they can sit there push a button on the truck to clear the radiator but the rubbish would just blow back later. What is needed is a better solution that can be done wants a week. Sometimes the dust that gets into the radiator needs to be cleaned out with a power washer it just wont be blown out by the fan. I think this is the major problem the fan just cant blow out all the dust and after time this causes blockages or if it is blown out just stay's in the engine compartment