Hello there,
For years I suffered glitches in arcade cores and even SNES due to his incompatible RAM modules.
Some months ago, I finally got a RAM module from other seller (there are many reliable sellers in Europe, like UltimateMister, Manuferhi, or RetroCastle on Aliexpress) and everything is working as intended.
It's not only that his RAM modules are incompatible with the Saturn core (that could be corrected, I guess, no guarantees) but other cores are affected and his designs also made my MiSTer full of static on the connectors, to the point I would receive an small electric shock most times I touched his MiSTer design.
Ultimately, I was helping people with incompatibility issues to understand the situation with his 4chips design on Telegram, and he deleted all my informative messages and banned me there, so I am trying to make it public here for our own good. Avoid.