MX644D, LS18X13X13-1W Dumbo speaker (or IceCube18X13X13-1W) and 17000uF SuperCap Stay-Alive

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 well.

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!

Please note that these guides are provided as useful resources for you, as-is. YouChoos cannot be held responsible for errors in the information, or for any damage caused to your models or equipment if you choose to follow any of the steps detailed here.