Ok, so I found the reason for the drums sounding right sided, I didn't notice it until you guys pointed it out. It was that I had certain elements of my SD2.0 routed to stereo outputs instead of mono, causing things like the snare to sound panned. That was a useful thing to learn, because I use to route everything in mono, including the overheads which made them sound narrow. I made the mistake of high passing bass and kick drum, don't really need to do that with this song. I learned a few new things about my rig here recently, I will give this mix another go soon.