Thanks for the advice Steve. I plan on correcting the rear left camber so they are both -1.5 again.

KW's shifting in their holes is something I haven't heard of before

IMR22C
KW's shifting in their holes is something I haven't heard of before

hahaha, I know it happened to you too!

B24
The hub has certainly shifted in the strut housing. You can make some 'shims' which will reduce this problem. Also make sure the bolts are nice and tight.

I'll be tightening it by hand myself this time, as tight as I can (as I already did on the front).
I think I know what you mean about shims to stop the bolt from moving in the elongated hole, but can you please describe it for me in a bit more detail?

It will be easier if I show a photo but is basically a '1/4 moon' shaped shin which is 2mm thick. Will sort something out in a few days. I recall one of the guys welding up the elongated hole then drilling a one hole for the bolt. I think this is a better idea than slotted holes.
I fitted grub screws either side of the bolt to stop it moving. Once it is bolted together it will not and has not moved since, then used my camber adjustment tops to adjust camber.

Best idea is to elongate to the desired amount then weld a washer in at that part of the elongation. You can then undo the tack and change at any time.
 
The Pearl uses only elongation to get its camber. 0-4 degrees if you want :)
 
 

I ended up taking only one more attempt to get it right this morning, now it's exactly -1.5 degrees on both sides. I didn't end up taking any of the above measures, but if the same thing happens again I'll do that next time. I tightened the bolts as tight as I possibly could by hand with a fairly long bar, so it should be OK hopefully.
 

 
I finally took some more photos of my car, I'll upload them all shortly.

Here we go, it's amazing what you can do with a phone camera these days (HTC One in this case):