Well I replaced my dads older Soundtraxx steam locomotive decoder with the new medium steam Tsunami and wow what a difference. I installed it in an Metal body Mantua which was built just before they sold out to Model Power. No DCC plugs were on it.
I still haven’t gotten around to doing my first decoder retrofit other than plug in decoder’s for DCC ready locos. I do have a Tsunami and speaker for a Spectrum Consolidation and maybe one of these days I’ll get ambitious enough to install it.