I find that the exercises are more doable when I rely on muscle memory or moving-do solfege in my head -- but both of these seem to me to be "cheating", especially the moving-do, as it is slow and ends up being impractical in determining chords that don't begin on the tonic.

Muscle memory is quite ...

Is this still available anywhere by any chance?

So I started playing with EarMaster, and I’ve vowed to make a habit of practicing with it daily. I think I’m severely lacking in some really basic musical facilities. Hopefully EarMaster will help.

I think it'll take a loooooong time, though. I have a rather strange upbringing:
-I’ve been playing ...

Same tuning as violin, by the way.