Thanks guys. DV, do you mean you preferred the modified LokSound to the Zimo in BMS?
The video in glendergs link is fabulous, but I didn't think the loco had that classic GM hi-pitched spooling up and down noises. It sounded a little like a BR diesel instead, but in fairness that may have been because in the video she was only shunted at low speeds and perhaps the decoder didn't get a chance to spool up the motor sound. The 071 chip I've heard had a more classic GM sound. If BMS uses the Mr Sound guy decoder, then that seems to narrow it down to three choices, BMS (Zimo Mr Sound Guy), Olivia's Trains (LokSound customised as per video) or put an MM071 chip in it (LokSound). Anymore 141/181 owners out there with sound chips? I'd read on one of the forums opinions that Zimo may not be as smooth a drive decoder as others, but that could be a myth?
PS: How did folk get on fitting speakers?