Sure Jack, it was a very straightforward build and the recipe looked like this:
Streacom FC5 Evo/Alpha
Asus Prime B660M-K D4
Intel Core i3 13100
Corsair 2*8Gb DDR4 3200(?)
Samsung 980 Pro m.2 SSD 250Gb
Streacom ZeroFlex PSU
All in all nothing exclusive, but still an extremely potent server for Roon.
Some performance figures and power consumption are listed in the linked spreadsheet here: