Hi Synkrotron,
I didn't need to route my decks to Sonar as I already had the track in wav format.
I recorded it in a studio in London way back in 2001, but we originally mastered it for vinyl. As vinyl was not the best format for dealing with BIG bass sounds (the needle jumps around in the groove), the original mix was quite bass poor for that reason. I just went back to the original wav mix (burned onto CD) and remastered that. My intention was to get a bigger, bassier sound for the internet age using Sonar's mastering suites. I'd originally tried using Landr, but was not so convinced. It sounded a bit light on the bass. I hope I got the required balance.
So, I'm afraid I can't really answer your question. ;)
Thanks for the listen - Phil