XRAY - Model racing cars

Hello, Alexander!
Recently I found you post about set-up for X12 and low bite carpet
At this weekend try it - damn, it works perfect, thank you very much!
But now I have problem with my T3'12 on that carpet.
I use sweep exp30evo carpet tyres.
Front springs 2.8, stab - 1.4, downstop 6.
Rear springs 2.4, stab 1,2, downstop 4.

My car too nervous, I can't handle it yet.
I try to get more rear grip with getting rear stab off - it works, but now car have very big under steer at corner entry without acceleration. I use front spool.

Could you get some advise - how can I get better balance for my car?

Try a 1.3 or 1.4 rear stabilizer to make the car less nervous! We did this all the time for the T3'12

Alexander - this T3 specific or why?
I always consider that I need softer rear, to get more stable and higher traction at rear.
May be I'm wrong in my thinking about setting up suspension?

You can roll too much and lose traction. It works I had same issue with my 12, running 2.4 rear springs I stood the shocks up and used 1.4 ARB on 2.6 rears it was settled on the 1.3 but sometimes lacked rotation so then I would drop to 1.2 and or lay shocks down a hole.