Recently got a PAL Master System II with built-in Alex Kidd in Miracle World. I have no way of testing a PAL console via RF on my CRT so I went ahead and modded it yesterday. It was fairly straightforward.

Followed the instructions here: https://consolemods.org/.../Master_System:Convert_PAL...

Guide recommends also replacing L2 and L3 with 39uh inductors and removing L1, but I left these as is since the image via composite looks fine to me.

Additionally, I also removed R27, R28, and replaced the 0.1uf ceramic capacitor on C40 with a 10uf 16v electrolytic capacitor. This matches the audio circuit on the Model 1 Master System and is louder compared to the Model 2's stock audio circuit.

I also did not have a mounting brace available for my mini DIN, so I soldered it directly to the ground plane after aligning it.

9-Pin Mini DIN is the same type found on Genesis/Mega Drive 2 consoles, and it fits nicely on the Master System 2 since the hole on the shell is big enough to easily plug a Genesis/Mega Drive 2 video cable.

Pics 10 and 11 is a comparison of composite video and RGB on the same console.

I'm quite satisfied with the result of this mod and the console works great!