Thanks Robo,
Gonna re-think top wishbone but would still like to keep it adjustable.
Do you think it's to weak solely because of the threaded rod? I was planning to change it with a machined part with threads both ends and a majority of the body inside the bush just machined to suit the insert with a close fit.
I've used this setup for now just to determine my rear geometry so still playing with it. Missus won't let me have shocks yet....
I know Westfield and others fit top adjusters with Aluminium inserts and have had failures and I believe Ash G had the same problem so hoping this would be stronger.
Thanks for your advice Johno