Just purchased my 1st Attex and I'm looking for a lot of information. It's serial #595 which I guess makes it pretty early. The tub is melted around the exhaust: is this a common issue and can it be resolved? It has a 5000 Baker Hill transmission, but has no linkage to the operator's compartment. What does this entail? Does this model have the same air filter assembly as the later models? I have no air filter and I'd like to use whatever was used originally. Thanks, Dan