Just working on Bach's Bouree in E minor at the moment. I have it down slowly so it's just a case of working with the metronome. I love the bass - sounds great.
Why would you want to purchase the RP course if you are doing the PP course ? With PP you'd hear a C and a G so you'd know that they're a 5th apart. Same with chords. imo RP would come with minimal effort if you have PP.
In my case I think that my ears aren't open enough for PP yet. Don't get me wrong, I find it easy enough taking things of CD's with my guitar in hand but away from the instrument it's another story. That's why I'm trying for RP first, too really open up my ear.