Been waiting on you guys running some Pcars stuff and the Junior is a nice car to drive for everyone, i'm not a fan of multi class racing as your just putting cars on a track to be overtaken over and over again.
I ran a Juniors series as my first one on Pcars and it went well, some good races, nice and close, but i think running it on GP tracks will bore you, its a slow car and is suited to smaller tracks.