Regulating volume for different presets

I'm loving this machine. I played in Seattle for 10 years with a Gold Top and a half-stack, a tuner and a footswitch. We have 28 song setlist and I've created separate pre-sets for each song. I'm wondering if anyone has tips for regulating volume from pre-set to pre-set. I'm using mostly the same amp/mic configuration, but I'm looking to make the levels more precise than just by ear, though that might be my only option. Tips and trick appreciated!