Quality post there @Mudpup and a lovely looking bass. I had one of the original SUBs too and bought a full fat ‘Ray (untried from eBay) on the strength of that. A lovely thing to be sure, but not in the same league tonally as the SUB. I later had a ‘Ray5 and used to run that in series, as that was my preferred setting. My Maruszczyk ‘Ray-a-like is always running in series too, it’s a lovely tone.
Enjoy your new toy.