Thanks, gents. I now have a Bandlab login and will be exploring the other tools mentioned.

As for Soundcloud mastering being an inexpensive way to learn, I wish! I may love the results, but I'm not going to be able to reverse engineer them for future projects. It's not like you get a report of all the changes made; you have to be able to listen to the recording and hear, then reproduce, them. And if you can already do that, hey, you're in better shape than me.

Plus, you're starting their process with an already-mixed-down stereo recording, which isn't the way one would work when starting out with 8 tracks. Of course, if the output from this base stereo mix is a whole set of separate mixes optimized for different hardware/streamers, that would be extremely useful, but this is not that; it's just one stereo remix.

Give me a service that lets me upload a Logic project then sends it backs to me with individual tracks adjusted then mixed down, with a full report on all actions taken! Now THAT would be $5.00 well spent!