Kit: MX644D; IceCube28X18X08-2W
Bachmann's D11 model is gorgeous! SImple to fit sound too... MX644D 21pin decoder is the easy bit. It is designed for a 28mm
round speaker, but we go for something better with an IceCube28X18X08-2W, which requires a bit of work with cutting the plastic
under the coal load, and placing the stay-alive capacitors above the slope, under the removable coal.
Photos above kindly supplied by Steve Payne. Examples below are different models, fully fitted.