This setup also works great on Sorex 28JB tyres with HPI Silver Springs all round and LRP 2 additive.

Any comment about 1mm shims under pivot blocks, does it prevents from body roll on high-grip carpet?

I use 1mm under the pivot blocks in pretty much all traction conditions as for me it just gives me more overall grip compared to 1.5mm. However, on high traction tracks I think it also prevents the car from traction rolling especially on carpet where the car tends to slide/move around a little initially before flipping.

If I think the car is rolling over the rear too much I have used 1.5 all round at the rear before but I always keep the front of the car at 1mm :-).