It might be the servo saver which is not making it run straight (happened to me), replace it with a normal servo arm. Leave the belts, over time they'll bed in and become looser. Slop in the steering is common, i think the only way to fix this problem is to replace the ball studs and turnbukle ends.
Got another question, this time about the blocks. At this point i am running kit standard blocks on my refine 2 (think they are A and 1XB, not totally sure) and they angle outwards \ / (like that), now if i was to change to D D blocks or any other blocks which were the same would that give me more corner entry steering?
Cheers, Charles