Hi Syn
If this helps ease your angst any, I just spent time "improving" an SSM2017 pre. I swapped cheap old electros for expensive ones, bypassed other electros with polyprop, pulled out a few Wimas and put in Sprague Orange drops, put silver mica in there in place of ceramic ......... there were a few more mods. I'll post them here when I'm ready.
So far the benefits have been negligible to my ears. My comment about "use the most expensive, it'll make you feel better" was actually mocking myself, although you couldn't know that.
My aim was self education, so it's been time and money well spent. But next time I'll buy a really good mic cable and get a decent singer. :green: