Hi to all I designed and printed a complex speaker box for the E8. The .stl file is at https://www.tinkercad.com/things/6cRVAyHspIf-speaker-cabinet-for-concor-e8-n-scale It is open for non-commercial use. I mounted an OWS 9x16mm speaker, 8 Ohms with CA glue on the opening. Then installed it in an E8, fitting it over the rear gear and shaft extension. It was affixed with double-sided tape. Used a Loksound Nano with the 51993 open wire plug. Sounds really good, and loud. Pictures soon.