Bachmann OO 3F Jinty 0-6-0 Tank... one of my favourite models, and one of the first I ever owned myself.
This remarkable DCC-ready model can take a Zimo MX648 8pin decoder and slightly reduced-height SugarCube speaker (or easier, a SugarCurve7) as a direct plug-in installation!
Just about squeezes decoder and speaker one above the other in the boiler.
This particular example also sports a firebox glow light (SMD orange recessed in the cab) and crew.
So we wanted a challenge... full-bodied sound and the biggest possible stay-alive in a Jinty! Turned out to be more straight-forward than we expected...
SuperCap17000 on the cab floor, with MX648, YouChoos Stretch7 speaker (new type being experimented with - great results!) with stay-alive through
a SACC16 baord. Decoder, speaker and SACC16 just about squeeze in the boiler. Just for good measure, we also put a firebox glow light in too!
Brilliant results - loud and full sound, and about 5 seconds of backup power!