Upgrade from E120 Classic to C125

[Bluedevil]

I am looking at replacing one of the E120's we have in our system with a C125 in order to accommodate a CP570. I have spent some time going through the FAQ's here and other posts and have put together the attached diagram of how I think everything would be connected to to the best of my understanding. I was hoping to get a confirmation that this configuration would work. Assuming it works, I was also wanting to know the following:

1. While running the radar on the E120, will I be able to see my waypoints?
2. Understanding that the C125 won't share cartography with the E120, can I run my existing cartography on the E120 from its CF Card slot?
3. Do I really need the Actisense NGW-1-STD or can the C125 be connected directly to the VHF and ST8002 via NEMEA0183?

Thanks,
Stuart