First of all Tom, I agree with much of what you've said. Presumably, though, making room for the speaker has altered the weight of the model, so I wonder if there is a reduction in haulage ? I would like mine to pull 12-14 coaches up a 1/100 incline, which previous Farish Type 2 and 4s do without any angst. (I am DCC but have no interest in sound.)
That said, presumably the speaker can be removed and alternative weight added, without affecting future re-installation of said speaker. I'd need to look when I get mine, unless anyone can comment just now?