What are the most popular springs everyone is switching to? I have a good amount of readily available Losi 22 springs at my LHS but I am also about to place an order for some spares so Durango springs are an option as well. I am running a full size battery, no shorty. Our track also has some pretty large jumps, but I can tune that with oil if need be. Also, what does everyone think of switching to 4 hole pistons instead of the stock 6 holes. I see quite a few people doing that on setup sheets.