“Oppomod” linear power supply

@ptss , mine was the 103 but I'm not then, or now, using any kind of isolation or conditioning. One thing I have to advise is that there are two versions of the OPPOMOD. The first one generated lots of heat and they went to a "cooler" version. The one I got wasn't from OPPOMOD and although the audio and video improvements are commendable, it does get hot on the longer movies.

Supposedly the Clones has always been on the cooler side of hot. I'd never dispute what @auxinput advises but more capacitors aside, I'd contact Funjoe over at Clones Audio for his take as well. He's an honest guy and he'll get back to you.

All the best,
Nonoise

My only experience with discrete regulators has to do with analog audio stages. I’ve used the Sparkos Labs discrete voltage regulators (which are ran in "Class A" and based on the same circuit in their op amps). The result is a faster and higher resolution sound to the audio. Smoother with less noise from the "A/C" line. I suspect they would improve digital sections too.
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The heat from the OPPOMOD power supply comes from both the power supply diodes mounted onto larger fin-based heatsinks in air and the voltage regulators mounted on an aluminum L-bracket. The L-bracket makes flat contact with the bottom of the Oppo case and distributes heat that way. The Sparkos discrete regulators I have used are direct swap-in replacements for the monolithic LM78xx/79xx and they will still generate heat, which means you need to bolt them to some sort of heat sink as well.
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The Clones Audio does have their power supply diodes bolted to a 1/4" thick piece of metal. However, it looks like their voltage regulators are floating in air, so i"m not sure what they are doing with this circuit. Maybe the discrete elements are circuits placed around the regulators to help them become more efficient (and possible generate less heat as a bi-product). I can’t be sure here without asking them directly (which you could do if you wanted).
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That being said, the new 203/205 models have switching power supplies that are about 2/3 the size of the older 103/105 models. I suspect they did not need as current since they dropped the FPGA chip that was required for Darbee and also dropped all streaming services from the firmware.

@ptss

I did indeed have nearly $8k’s worth of a power treatment and grounding solution (Alan Maher Designs) at the time the OPPO MOD was added to my 103...have added even more since.

The 103 is not well ventilated but I’ve had no issues with heat retention at all and my install was also done at EVS and is similar to what Geoff describes above.

@ptss
Yes, you can clearly hear the difference even with excellent conditioning and ancillary components.  With my 203, I'm using a Shunyata 6000/S line conditioner, VH Audio Airsine PC, MIT Oracle digital cable to my EMM Labs DA2 DAC and the unit is sitting on four HRS Nimbus Assemblies, and the difference between the stock SPS and a LPS was pretty amazing.  Not only improved audio - particularly a huge drop in the noise floor and removing glare, but also a more natural presentation of video for BDs. 

I wasn't really sold on that Oppo mod LPS given that it had no heat spreader and was way more expensive than other models without explaining why.  Since I only use the 203 for BR, I got a digital only LPS and disconnected the analog board (which also helps).  The LPS cost around $150 on ebay and is amazing.  No complaints.  I ended up also changing the IEC and internal cabling of the 203 which brought further improvements but the LPS was the game changer.