I've been offered a 1990s MTH engine with the conventional DCRC QSI electronics with the whistle (not PS1 from what I know).
Since it isn't PS1, do these electronics still need the battery and have the "quirks" of PS1, especially with batteries. Are they pretty bulletproof?
Any overall comments? I'm likely going to accept the offer but just want to see what I'm dealing with as I haven't touched a PS1 engine since the PS1 days!