Tested what you suggested for the AES but it didn’t work. Tried tinkering with a few other things too but had no joy 🙁
My sega megadrive cable keeps losing sync too I think the scart connector might be a little dodgy.
Tried to fix the sega saturn image (jumpy with purple band at the top) but had little success.
The Dreamcast worked without the Toro, I will test with the Toro when I have a scart lead (can’t find any around the house).