I run Associated springs and currently have grey front / yellow rear on my TM2.
My TM4 has orange front and yellow rear.
Like Kev says sort your pistons/oils/springs and then check your anti-squat, toe in and links.
Stotfold if you've not been is a very challenging, grippy astroturf outdoor track so Kev's base set up will stand you in good stead for most outdoor astro in the UK
