I've got the QA1 adjustables all the way around on my wagon. I think there are actually 14 settings, but mine are set on F:8/R:7 right now. I'm having some "bouncing" issues, but I think those are mostly from bags. I've turned them up to 14 before and it about shook the teeth out of my head. I'd be curious to hear what you end up doing and how happy you are with them. My jury is still out.