To continue the updates on these ball-joints, I have today received an 'new but old stock' First Line FBJ5150 item from a seller on FleaBay. It looked like the one I took off the car in the photo and it seems the telling, easily identifiable difference is the lack of a Hex socket locator in the tip. The Taper is indeed 14.4mm at the top and 15.5mm at the bottom and of course fits perfectly. The previous items I had to return to Mini Sport were 13/14mm as you know, but had a 6mm Hex socket in the tip - the one that fits has a simple machining indent and nothing more. Interestingly, the cross-ref Part No. on the First Line box does quote QH QSJ1059S, but I do feel that something has changed in recent years with the specs of these things. The First Line one is dated July 2014.
I have still to receive the final pair that I ordered from OnlineCarParts.Co.Uk, so jury is still out on those, but I will post update once these (identified as MOOG RO-BJ-3409) arrive.
![[Linked Image]](https://www.tm-img.com/images/2020/06/27/09104869-0488-45DD-87DD-55837983D39C.jpg)
![[Linked Image]](https://www.tm-img.com/images/2020/06/27/405C5732-A795-4718-85E3-527EC687C2AC.jpg)
![[Linked Image]](https://www.tm-img.com/images/2020/06/27/ED0654C9-C1FD-4972-8666-BF5D1D80CD56.jpg)