The building that hides the speaker for the Carlin yard switcher sound is now finished. This was a Design Preservations Models - Hayes Hardware kit. The building itself was not modified as it fit nicely into the space I had for it.
The theme of this building is that of an older hotel which has seen it's better days pass when the interstate highway was built. It has been refurbished and has had a large neon sign installed on the roof that can been seen from the interstate highway in the hope of attracting business.
I had recently purchased a 3D printed set of 180 roof top details and used 9 of those on the roof of this building. The animated sign if from Miller Engineering with the support structure being scratch built from styrene.
The electronics for the sign clip into a plastic cap from a prescription bottle which is glued under the roof of the building. The power wires for this go down through a hole in the bench work and are connected to a voltage regulator from Miller Engineer specifically for these signs. The wires for the speaker also go through the same hole.