Loose rear

[NeilD]

Hi all, i'm running my BX with the one piece chassis and Bradders rear shock mount but i'm having difficulty indoors with rear grip. The shocks are kit Yoke with Associated No.1 pistons and black springs. I have tried the different Yokomo springs but reverted back the the black. I raced last night, the track is carpet and shiny floor, the rear end was much more stable but still not quite right. I currently have 30wt oil in but have tried 25.

Any help appreciated,

Neil.