Scratch developing into something on the L wing mount. Keeping an eye on it.
The size of the rear control arm rod ends is such that there is NO way to put a wrench on the interior jam nut. The rod end fits into the subframe with no space for a wrench. Terrible.
Resolved by hacking, cutting is too elegant a term, metal from the control arm mount. Next time, will know to look for a control arm with a smaller rod end.