[Attaniuri]

First, M+S Westlake's will not be the best tyre to be using on gravel.
They are designed to grip mud and snow not loose gravel. Try finding some used rally tyres.
I must say tho, it might be in your best interests to join your local car club and enter some autocrosses. In these events you can get alot of help with what you are doing.
Anstis, you maybe aware that One of those forums are closing down soon too...