Valid concern. I made a little visual inspection from the inside of course, but didn’t find anything. Now that I think about it though, I didn’t check below the PCB.
Another person also mentioned that my soldering work isn’t that clean, so I will probably open the thing again and check for bugs and redo my the cable.
Awesome to hear that it works on real hardware. It’s so cool to play new mods on decades old consoles.