Rear toe in woes

[Eternal]

Right then! after getting all worked up about the posibilty that my rear diff frame could be all wrong. I took it upon myself to remove all the wishbones and bits to measure it all up.
Well! it turns out that its ok... as in i get the same measurements for both sides. I then installed the lower rear wishbone on the side that was giving me problems to find that its seems to be sitting ok. Now i have reinstalled the upright from the other side just to see if that was causing the problems and it looks like the issue has resolved itself. Very very strange. Im going to put the wheels back on and put the upright onto the otherside and see if that gives me rear toe out on the other side.