Hey, from what i know, the SOL is like the younger brother of the DC7. The DC7 has more output ports and has a passthrough to connect extension units like the DC8 or the Crux if you have a huge board etc... but otherwise they're mostly similar.
Yes the SOL will work for what you're describing - you're right about the current doubler cable. This one in particular was recommended by a user also:
https://logsdonaudio.com/cables/for-cioks-dc7-power-supply-and-line6-pedals-current-doubler-cable
This will connect to the CIOKS power output RCA type connection, plus it's bundled into one simple cable.
Hope i'm not too late with the input, cheers!
