akane and all fours are pretty much right. st185's , well my one did and i have heard similar comments from several others , are prone to unpredictably switching between under and oversteer.
you would be doing very well to hold a slide for any length of time in one. its been a while since i had mine, but usually it would understeer first, then flick into oversteer very quickly and it pays to be prepared for it. the best i could ever reliably get it to do was stick the tail out briefly and pull it back in. if you're not fast enough youll find yourself facing the other way.
it might be a bit different on gravel and grass, but i did a grasskhana in my one and it was still a bitch to predict what it was going to do.
if you get on a track i guess youd wanna try and stay smooth through the corners and dont throw its weight around too much