What do you mean by you desoldered the RCA jacks? I assume you are talking about the input RCA jacks?
You are probably right that nobody is reading this.
Sadly most of these DIY design seems quickly forgotten. From what I see only the very affordable ones (like CMOY) or the very high end ones remains popular.
I was trying to spot the difference between the BOM from Jeff and the one on the website. So far I spotted one difference, I am not sure how significant though. For C6L/R it is "Metalized Polyester/Polypropylene Film Capacitor 1μ 63V" on the website and "Boxed Metal Film Capacitors 63V 1.0μf 5%" on the Jeff's BOM. Does it matter to use "boxed metal film capacitor" over the Wima I have, which is a metalised polypropylene capacitor? It is interesting that on Jeff's Excel sheet it is listed separately from C2L/R, which are the same value as C6L/R but is a metalised polypropylene capacitor (Wima).
Edit: In Jeff's Excel sheet, the C6L/R Mouser part number links to a polyester film capacitor, which from what I understand, are similar (if not slightly inferior) to polypropylene film capacitor. I wonder why Jeff do this?