Nice one Who :), You will improve a lot more with a better setup, I mean the hard track setting is alright, then you move onto the race s setup which is quicker. Then you maybe download a hotlap setup and then tweak it (which I done), or start from scratch and do your own setup.
Also, i'm guessing you mean Blackwood GP forward and not reverse ?
Because if you were wanting Blackwood GP Reverse then my video a few posts back might be helpful on braking points and lines. I might host a private server so you can join, and study/drive round with me to help you maybe ?
That offer goes to anyone, i'm not the fastest on LFS but I might be able to help get up to a reasonable pace ;). If I was to hotlap then I think I would be around 20-30 on the hotlap rankings on most tracks.
Also you can check http://www.lfsworld.net for stats and hotlap rankings along with loads of other things.