O.k. that is not directly modular related but chances are someone here also uses an old CR-78 to sneak those Phil Collins vibes into the Eurorack performance.
I tried to sync my CR-78 via Midiclock using various converters but had issues with all of them so I decided to build my own which took WAAYY longer than expected. I call it the Compusync 78.
The Compusync 78 can also be used as a realtime programmer for the CR-78. It looks a bit DIYish because it is, but the result, especially timing and START/STOP behaviour is very good.
So if someone is interested send me a private message since I hand built a small batch of devices I am happy to sell.
Also did a video to showcase the interface with my best presenter skills: