i increased the ride height from 4mm to 5mm,and I'm running the front at 6mm, which I didn't play with, but I'm thinking I might be right. I will try it again next week and maybe the front springs as well to help improve the steering.
I think my problem with mid corner turning could be related to my diff, as I believe if it's too tight, it does cause understeer...but I need to research more to get a better steering feel all round.