This post is just for future record more than anything else.
After a lot of issues with the wobbles on my SSZ-IV rotorhead I have fixed it by installing a Hirobo 490mm flybar.
Here are a couple of interesting links from RR with some great info from DR Ben and others.https://rc.runryder.com/t522227p1/https://rc.runryder.com/t513533p1/
I’m not sure anyone is particularly interested these days but I think it’s important for information to be easily found for those requireing it.
Please feel free to add more links or info.
Futaba T18SZ, JR Propo XG14, Hirobo fanatic!