[Question] RTE + Save Upload on PS Playground Compatible FW

Hey guys,

What is the latest PS PG compatible FW? 3.55?

This is what I'm thinking I can do:

1. Update to latest PS PG compatible FW on secondary PS4
2. Use PS Proxy to sign into PSN
3. Download saves
4. RTE games (j0lama?) and save
5. Upload saves
6. Pull down save on primary PS4

Is this process possible with our current exploits/software?

Thanks in advance.