I just finished modifying the output stage of my Playstation following Mick Feuerbacher's output stage modifications
www.dogbreath.de. I used two 4.7uF/50V Black Gate N electrolytic capacitors, two 22k/0.5W/1% PRP metal film resistors, Mundorf 24 AWG Silver/Gold hook-up wire, and WBT 4% Silver solder. I guess you can say I like boutique passive components. I'm listening to the modded player and it sounds really good. The difference between this and the tweaked stock unit is small, but the modified player sounds more refined in the highs and more detailed. The midrange is warm and there's more punch in the low end. The soundstage is larger and deeper with the modded unit. I suspect that the modded player will sound better with time as the Black Gate N electrolytic capacitors burn in. Overall, the qualities of the Playstation are retained and slightly more enhanced.
The modified Playstation is an improvement over my tweaked stock unit (PS Audio Power Punch C7 AC power cord and Isoclean 2A fuse). I still think the tweaks really enhanced the performance of the stock Playstation and the output stage mod has just taken it to a higher level.
I only started soldering a few months ago watching YouTube instructional videos on soldering. This has been the most challenging project to date since I was working in a very confined area and had to be careful not to damage any Surface Mount Devices (SMDs) on the Playstation's motherboard, but everything came out well. The effort was definitely worth it. If you own a Playstation, I highly recommend the output stage using the Black Gate N capacitors. Get them while they're still available.