I have owned a Marantz SA-10 since middle Summer of 2018.Several threads here about the SA-10.
I am unlikely to do any mods to it since it has a five year warranty. Not eve a fuse. And it sounds wonderful as is.
My main claim to fame is I use it 100% as a DAC. Feeding it my five disc CD changers (eBay $40 stuff) and it still sounds great.