I also like what jimmikaelkael said. SMB is fully optimized for opl. Right now he's focusing on compatibility before speed improvements. Which is good, to make sure every game works and then try to make work/load faster afterwards. I asked my question about your settings to make sure that I will have smb as good as it can be on my side so that all future speed improvements will be easily noticeable on my side.
So no rush on your side. I'll just be happy to be able to see something and compare it to my setup when you get around to doing it.