Bryan, since Larry answered your questions to me I'll skip adding to it, except I have also used the same mixer and they are good. Look at the others thay have too, though.
Skybird, if you are only uploading your own songs why use the import from singers?
Wouldn't it be better to do the import one time from the regular import screen with a "Custom Assembly" brand or even set the brand to your name? Then you would have them all available all the time. You could even send them to a separate folder away from your regular kma files. That way you could build the database without them, create your songbook, rebuild the database including that folder. That would give you songbooks for the public that don't show your private collection, but would still allow you to use them.
