Look, I'll put my hands up to having changed my springs OK. Does this mean the "stock-spec" police will be waiting for me when I get home tonight???
I run mine on carpet and found that it was just toooo soft on the front and rear ends. On the slow speed tighter parts of the track layout we had, it was just lazily rolling over so much it was getting boring. Couldn't be arsed to faff about with the oils and shock positions and fitting as many preload spacers as I had to the kit springs just made it worse landing the jumps.
I've got Truck reds on the front and Truck/Buggy blues on the back and it's at least manageable now. In fact, compared to my B4 which I brought out of retirement last night its a doddle

.
So anyway, please don't shoot me for deviating from kit spec, sometimes for some of us lesser talented mortals, it's necessary.