The trend seems to be heavier chassis with the older style kingpin front end. Everytime I've tried and Associated old school front end it seemed overly aggressive. But since I went to the titanium chassis with the tungsten the lower center of gravity seem to tame down the aggressive front end. I still use a CK25 also. And maybe the Bell crank steering is taming it down a bit also between the two of them the car had a very good weekend for the first time out last week.
I also pay very close attention to front to rear weight distribution. 39/61 f/r is almost impossible for me to drive or at least tune the car for. Last week I ran the car at 43% front moving it down to 42% next race.