I got so frustrated with it, in the end, I dropped the subframe, so no issues with where it was supported.
You can see how far out it was here, I think it must be down to the powerflex in the front of the control arm not having enough play to get the other end into position, that was the only variable I couldn't change to test.
Alloy arm and standard bush alignment is good
Steel arm with WALk, I'll leave it like that. Not had the tracking done yet, but I can already feel its much tighter