Vincent Fong linear PSU and TDA-1387 DAC HAT, many thanks to Mr. Fong for the parts & his advice. Based on a Raspberry Pi4 & the new Touchscreen 2, I’ve got to say that installation of that was a breeze in Volumio. All sounds great too!
Case is a home build, I have access to hand tools and my trusty Dremel mostly so forgive that & my general lack of woodwork skills. I was channeling a sort of Grundig Radiogram look here.