Okay lads, (and maybe a few lasses

)- this is what I gleaned so far:
MFU- The MultiFunction Unit is actually a V6.0, and not a 6.1 as suggested in the Ad. But, that's okay, as I'm impressed by the performance anyway. What's more, the unit takes up less than
half the internal real estate space that a brace of Tamiya DMD units (ESC DMD + MFU) would occupy. Before you say it, yes, that's also true of the Clark TK series, the IBU2, and the Elmod as well.
However, this unit needs no programming. It should just work. More than that, I like the fact that it allows the gleeful operator the option to:-
- Switch the smoker on and off remotely
- Adjust the volume of the speaker remotely
- Change the engine and related sounds, remotely, just with the press of two buttons.

In fact, I quite enjoy the novelty of running the Panther around accompanied by proportional
Abrams sounds.
Here's the unit in place in the plastic HL, prior to the transplant into the Taigen.
Smoker On this type of smoker, which still makes a mechanical noise, but is quieter than earlier iterations, the 'Hole of Filling' is also the hole of smoking.

Thus, only two pipes are needed, and not three. There is a later smoker available with a fan, and when it arrives I shall install in in the Panther. This one will suffice for the meantime.
Taigen Hull The Taigen metal hull has a switch plate incorporated into the hull floor. The plate includes a volume pan pot (potentiometer); an on/off switch for the smoker; and an on/off switch for the main battery supply. As it stands, this plate is redundant. Why? Well, the V6.0 unit has its own independent power switch, whilst the smoker and speaker volume controls are managed electronically by the transmitter.
I'd say, it's safe to remove the plate and associated wiring, and then blank the space off.
This is what the HL plastic hull looks like, naked:

I may put some small plant pots in it.
Incidentally, the Plastic hull, with running gear- but minus the motors- weighs just over 1lb (1/12 Kg), whereas the Taigen metal hull, with metal wheels, is almost three times that weight.
Thus the power to weight ratio is much greater in the cheapo ABS hull. Still, I'm reasonably confident that the V6.0 can handle the extra poundage.
More later, when I get round to transferring the guts of the plastic Panther to the Taigen special. So far, the motors and tracks are in place, without a hitch

"Get your facts first, and then you can distort them as much as you please"- Mark Twain.