Out of the box, the Rapido model is highly detailed and joins loco to tender with an innovative 8pin electrical coupling - a bit tricky to plug and unplug, but works
Tender contains 21pin socket and a factory-fit iPhone-style speaker underneath the circuit board.
A Zimo MX644D 21pin decoder, wired through a SACC16 board to a SuperCap17000 will give great back-up power - which seems to be quite important on this model
which stalls easily.
A simple install is to put the SuperCap and SACC16 board up in the rear of the tender - very easy, and reuses the iPhone speaker.
However, after some testing we establish that a Zimo LS18X13X13-1W Dumbo speaker will fit at the rear, and sounds quite a lot better than the iPhone speaker.
Out comes the iPhone speaker, and underneath goes the SuperCap. The SACC16 board is positioned just behind the 21pin socket, and the LS18X13X13-1W sits at the rear.
The finished model. The factory-fit firebox glow light is a nice bonus, and prepared connections for loco lamps is also a very neat touch, though you've got to be
brave to open up the loco to fit some actual working lamps - very delicate!