Something I just tried for the upcoming truck race at Gravity Throttle: after drilling and tapping the posts, I cut the spring from inside a retractable pen and slipped it over the posts and then when I screwed it togetjer, I only screwed it about halfway. So the chassis is a little loose, but can travel slightly up and down due the the springs. So instead of axels being suspended, it's basically the whole chassis moving slightly. It worked at home, interested to see how it works in the race.
Something I just tried for the upcoming truck race at Gravity Throttle: after drilling and tapping the posts, I cut the spring from inside a retractable pen and slipped it over the posts and then when I screwed it togetjer, I only screwed it about halfway. So the chassis is a little loose, but can travel slightly up and down due the the springs. So instead of axels being suspended, it's basically the whole chassis moving slightly. It worked at home, interested to see how it works in the race.